List of Scooby-Doo! Mystery Incorporated episodes

A slime monster living underneath Crystal Cove is cocooning anyone who gets in its way. Despite being warned not to continue investigating by their parents and authority figures, the gang attempts to solve the mystery. While investigating the caves under Crystal Cove, Daphne finds a locket containing a photo of a young couple. The gang realizes that the cocoon is made of a frozen yogurt-like substance from a new dessert shop, then realize that the new shop and the bank are near each other. After trapping the monster in the dessert shop, they reveal the monster is their science teacher who was trying to tunnel into the bank. Later, the gang receives a call from "Mr. E", who says "the real mystery has just begun".

Overarching Mystery Events: A locket shaped like a magnifying glass found in the Crystal Cove caves and a call from Mr. E.

Villain: The Slime Mutant/Professor Emmanuel Raffalo

Mr. E informs the gang that a mystery is waiting in the nearby ghost town of Gatorsburg. The theft of their engine prompts them to check into the local hotel. A sinister messages appears to Scooby, who is later forced to spend the night in the Mystery Machine. He's attacked by gator people, and leads them back into the hotel where they chase the gang, only stopping once the gang steps out of Gatorsburg. The gang returns, and realizes that the gator people are passing artificial gatorskin products off as real. They reveal that the gator people are the only three residents of the town (the hotel's owner, her son, and her brother, the mechanic).

Overarching Mystery Events: Hotel sign reading "The dog dies!" and Mr. E's note claiming that Gatorsburg is "one piece of the puzzle".

Villains: The Gator People/Greta, Gunther, and Grady Gator

Crystal Cove is being terrorized by a mysterious ghost truck that has been running people off the highways. Meanwhile, crystal doorknobs all over the city have been disappearing, The gang investigates, discovering that the truck is outfitted with unique tires. They follow the tire tracks to a secret hideout where all the crystal doorknobs are stashed. Meanwhile, while Mayor Jones is running against George Avacados for reelection, Barty and Nan Blake try to set Daphne up with wealthy heir Rung Ladderton. With Angel's help, the gang finds out that Avacados purchased tires identical to those on the ghost truck, and that his father stole a priceless diamond long ago and hid it as a doorknob. Suspecting Avacados, the gang traps the ghost truck, only to discover its driver is Rung, who is not as wealthy as the Blakes believed and needs the diamond to restore his fortune.

Villain: The Ghost Truck/Rung Ladderton

A giant crab interrupts a volleyball game at the Crystal Cove beach, taking the players hostage. This reflects badly on the game's sponsors, Trickle's Triquid. Fred constructs a trap for the crab, but it fails, and the crab takes Daphne. The gang then discovers a system of tunnels and catwalks under the beach, which the crab uses to get around. The gang traps the crab, revealing it to be the water company's mascot, Bud Shelton, who came up with the Triquid formula which Trickle stole and took credit for. Meanwhile, Mr. E sends the gang a newspaper article about four kids who disappeared in the caves, which Daphne uses to identify the kids in the locket photo.

Villain: Man Crab/Bud Shelton

Overarching Mystery Events: A newspaper photo revealing the kids in the locket as Brad Chiles and Judy Reeves.

A monster called Que Horrifico is turning the children of Crystal Cove into monsters, prompting the parents to move away. At school, Fred is being tutored by Mary-Ann Gleardon, who believes she's too smart for everyone. To help solve the mystery, Velma and the gang speak with a teacher at school who is familiar with Que Horrifico but believes he turns into the monster at night. They agree to watch him for the night, only for the real Que Horrifico to appear, commanding the children attack the gang. The gang accidentally turn a television on, and the children sit down to watch, revealing themselves to simply be pretending to be monsters. The gang traps Que Horrifico, who is revealed to be Mary-Ann, who wanted a Crystal Cove with no adults so she could turn the city into her utopia.

Fred falls for new student Alice May, who he asks out to prom, much to Daphne's disgust. She later notices suspicious behavior from Alice, and investigates, finding more suspicious behavior. Meanwhile, the gang stumbles onto the mystery of a ghost girl kidnapping her prom dates. They follow the clues to a cemetery, where the ghost girl attacks them. They hide in a crypt, where they find clues relating to the crimes of Deacon Carlswell, the Creeper. They also find a yearbook, where the original Mystery Incorporated is listed as a club. Everyone goes to prom, where the ghost girl attacks. The gang traps her, revealing her to be Alice. She's Deacon's daughter, and wants revenge on the gang for getting her father locked up. Later, a man working for Mr. E releases Alice from prison, revealing Deacon never had a daughter and she was working for Mr. E as well. The man wants the gang to "start looking into the real mystery hiding beneath Crystal Cove – a mystery that led to the disappearance of four youths; a mystery whose time has come to be solved."

Overarching Mystery Event: An old Crystal Cove High School yearbook introducing the gang to the original Mystery Incorporated; the revelation that Alice May was working for Mr. E, who wants the gang to investigate a specific mystery concerning the disappearance of four children.

Villain: The Ghost Girl/Alice May

The Hex Girls, Velma's favorite band, come to Crystal Cove on tour. Their concert is interrupted by The Phantom, who wants them to stop making and performing music. The Hex Girls refuse, so the Phantom attacks them, injuring lead singer Thorn. Daphne is tasked with performing as the new lead with an original song, and Fred realizes he has feeling for her. Scooby, angry with Shaggy for choosing prom with Velma over the movie marathon, replaces him with a puppet. The Phantom attacks while they're fighting, and Shaggy notices the Phantom's pants match those of former internet sensation Fantzee Pants. The gang traps the Phantom when he tries to attack Daphne at the final concert, revealing him to be The Hex's Girls' writer, Daniel Frezette, also known as Fantzee Pants, who wanted revenge on The Hex Girls for unintentionally causing his career to tank.

Villain: The Phantom/Daniel Frezette (Fantzee Pantz)

The gang attends Crystal Cove's Royal Knights Fair, where an evil gnome is paralyzing those dressed as pirates to punish them for their historical inaccuracy. Velma reveals her relationship with Shaggy, while the gang begins to suspect one of the fair's owners who vocally expresses hate for pirates and is short enough to be the gnome. While trying to trap the gnome, Shaggy is captured. Later, the gang successfully traps the gnome, revealing it to be Gil Littlefoot, who wanted to frame his wife for the attacks to claim her fortune. As the gang is walking through the fair, a hooded figure drops a box at Velma's feet. Inside is a note from Mr. E, telling Velma "this has all happened before" and a picture of the original Mystery Incorporated with their parrot, Professor Pericles, circled in red.

Overarching Mystery Events: A photo of the old Mystery Incorporated team highlighting their parrot Professor Pericles; a note from Mr. E telling Velma not to give up on her relationship with Shaggy.

Villain: The Gnome/Gil Littlefoot

Two monsters, named Humungonauts by Sheriff Stone, are destroying properties in Crystal Cove. Fred decides the gang should call themselves Mystery Incorporated after those that came before them, and orders the gang uniforms. Shaggy is forced to chose between Velma and Scooby. Mr. E helps point out to the gang that each Humungonaut is only destroying properties owned by a certain insurer. They trap the monsters, revealing them to be brothers Jax and Max Minner, who are attacked buildings insured by the other.

Villains: Green Humungonaut and Red Humungonaut/Jax and Max Minner

When a violent dog begins terrorizing Crystal Cove, Stone wrongfully arrests and locks up Scooby-Doo. Velma finds a robotic leg at the scene of the crime, and accuses Jason Wyatt from her robotics class who is obsessed with her. The gang then goes to visit Scooby in Crystal Cove's Animal Asylum, where they encounter the criminal genius Professor Pericles. He warns Fred to beware those closest to him. The hound attacks, and the gang breaks Scooby out. They trap the dog and its owner, revealing the owner to be Jason's mother, who wants revenge on the gang for not befriending Jason. Shaggy chooses Scooby over Velma, reflecting on how much he missed his dog. Velma is unimpressed, and receives a text from Mr. E telling them to "follow the parrot". A news article reveals Pericles has escaped the Asylum.

Overarching Mystery Events: A cryptic warning from Pericles telling Fred to beware those closest to him; a text message from Mr. E telling them to follow the escaped Pericles.

Villain: Fright Hound controlled by Mrs. Wyatt

While the gang grows more divided, a vampire is stealing seemingly random items from around Crystal Cove. Velma and Daphne investigate separately, suspecting Nan Blake, while the Fred, Shaggy, and Scooby investigate the botanical gardens. The gang reunites when the vampire steals an orchid. They visit the Dinkley library, where Ed secretly helps Daphne discovers a joke youth serum requiring all the ingredients that have so far been stolen. They fail to capture the vampire when they try to trap her in a restaurant's wine cellar, but successfully capture her in a museum. She's revealed to be Nan's assistant, Sheila Altoonian, who is jealous of Nan's looks. Despite the success, the gang is still split, with Velma suggesting "maybe we're not a team anymore".

Villain: Vampire/Sheila Altoonian

Overarching Mystery Event: After assisting an unknowing Daphne, the man working for Mr. E is revealed to the viewer to be Ed Machine.

Now broken up, the gang decides to get on with their individual lives by touring the nearby Darrow University. When Char Gar Gothakon attacks the campus, the gang is forced to reunite. They investigate Prof. H.P. Hatecraft, who created the character. The attacks prompt him to admit his work is fiction, only for Char Gar Gothakon to kidnap him. The gang eventually traps the creature, revealing it to be student Howard E. Roberts, a superfan of Hatecraft's who wanted to destroy his critics. The gang then finds a chest full of Crystal Cove's history, and a note from Mr. E, saying the original Mystery Incorporated wouldn't have disappeared if they'd had that chest.

Overarching Mystery Event: Darrow Family Archives are stolen from the university by Mr. E.

Villain: Char Gar Gothakon/Howard E. Roberts

A cicada creature is attacking Destroido employees after demanding they quit their jobs. Meanwhile, a new teacher at Crystal Cove high is also against Destroido for how environmentally harmful they are, openly criticizing Shaggy and Scooby's consumption of a Destroido-made snack. Because of the teacher's love for cicadas and because of Daphne's appreciation for him, Fred suspects the new teacher. The gang traps the creature at the Cicada Creature Festival, revealing it to be Grandma Moonbeam, the creator of the snack Shaggy and Scooby were eating, who wanted revenge on the company for changing her recipe.

Villain: Cicada Creature/Grandma Moonbeam

The gang is forced to forfeit their place in the Mystery Solvers Club State Finals due to Scooby's illness. However, Scooby suddenly makes a recovery, and the gang attends the convention. All the human mystery solvers are taken hostage by Lord Infernicus, while Scooby, Jabberjaw, Speed Buggy, Captain Caveman and J. Wellington "Mudsy" Muddlemore try and stop him. They discover that Infernicus has turned the humans into hamsters, then discover he's trying to take them out of Crystal Cove via train. Scooby and friends rescue their humans, and reveal Infernicus to be The Funky Phantom, who is angry that he's just seen as a side kick. Scooby then wakes up, revealing the entire mystery was a fever-induced dream, and the gang tells Scooby he's much more than a sidekick.

Villain: Lord Infernicus/J. Wellington "Mudsy" Muddlemore (The Funky Phantom)

Much to Daphne's dismay, Fred invites the gang on their second date. When the restaurant is attacked by a group of Orcs called the Wild Brood, Daphne and Velma eagerly ride off with them. Elsewhere, a dangerous weapon is stolen from an armory, and the culprit is shown to be an orc biker. Fred blames Odnarb, the Brood's leader, while Daphne defends him. Velma notices a clue saying "swordfish" but she and Scooby are kidnapped by a shadow orc before she can inform anyone. The orc tells her to reroute a train or he'll kill Scooby. Velma reflects on the irony of her having the chance to get Shaggy all to herself, then proudly admits she'd never do that to Scooby, and reroutes the train. She tells the Brood of the clue, and they realize that the shadow orc wants to steal the Swordfish game counsel. They reveal themselves to be a group of programmers and game developers, who dress up as orcs to blow off steam. They board the train to stop the shadow orc, who is revealed to be Maxwell, their copyboy who always wanted to work with them, not for them. Daphne is given the option to ride off with them, but chooses to stay with the gang.

Villains: Shadow Orc/Maxwell the Copyboy

Crystal Cove is taken over by Aphrodite, who spreads a love potion that turns the residents, including the gang, into love zombies. Scooby finds himself allied with Pericles, as both are unable to smell Aphrodite's potion and are thus immune. They discover an antidote, gather the ingredients, and make it, narrowly escaping Aphrodite and her love zombies. Scooby frees the gang from the potion. Velma discovers that Aphrodite is Amanda Smythe, a former Crystal Cove High Student who was the victim of a cruel prank involving prom royalty. She's going to have Crystal Cove throw a prom her where she'll be crowned queen. The gang sneaks into the prom, doses everyone with the antidote, and traps Aphrodite. Pericles disappears, and later, Ed Machine appears to the gang. He shows them a message Pericles sent to Mr. E, revealing that he sent Amanda the potion. Helping Scooby retrieve the antidote ingredients allowed Pericles to obtain three items he needed for reasons unknown.

Overarching Mystery Event: The revelation of a feud between Pericles and Mr. E. Pericles reveals the three objects he needed from around town.

Villain: Aphrodite/Amanda Smythe

The gang visits the ruins of the Darrow family manor, as the original Mystery Inc. was looking into them. They become trapped inside, and a strange voice tests them with various traps. Velma realizes that the voice think they're the original Mystery Inc., as the traps are designed for them. As the gang searches for the voice, they find a golden disc piece. The voice, revealed to be Danny Darrow, the last survivor of the Darrow family, violently chases them as he tries to retrieve his disk piece. An earthquake causes the house to start falling apart, and upon realizing the gang is not the original Mystery Inc., Danny lets them keep the piece, hoping they can use it better than he and his family could. The gang escapes while Danny dies with the ruins of his mansion.

Overarching Mystery Event: The gang learns more about the original Mystery Inc. through their investigation of the Darrow family manor. They find the first piece of the disk.

Villain: Danny Darrow

Exchange student Mai Le arrives in Crystal Cove, and joins the gang at the Blake mansion for a dinner party with Mr. Wang, a visitor from China. There, a Red Wizard attacks and warns them to stay away from the Dragon's Heart. Later, Mai Le and the gang are attacked by a White Wizard who is after Mai Le's ring. The Red Wizard saves them, but the ring is already gone. Mr. Chen of the local internet cafe and tea house reveals himself to be the Red Wizard, tasked with protecting the Dragon's Heart. Because the White Wizard now possesses all four rings, he can steal the Heart. The gang traps the White Wizard, revealed to be Mr. Wang, but the Heart remains missing. Mai Le is revealed to have stolen it, and she is stopped in the harbor by Shaggy and the gang.

Villains: Red Wizard/Mr. Chen, White Wizard/Mr. Wang, Mai Le

Scooby and Shaggy win a dinner with Vincent Van Ghoul, but the meal is interrupted by monsters from van Ghoul's movies. The three run, but a fourth monster, Nightfright, emerges, prompting van Ghoul to reveal that Shaggy and Scooby are on a reality show where unsuspecting fans dine with van Ghoul only to get attacked by monsters from his movies. Nightfright, however, is not one of those monsters and is not part of the show. Fred, Daphne, and Velma arrive after being called for help. A script featuring Nightfright is found, and the monster is revealed to be Arcus Fentonpoof, who only wanted his script adapted by proving Nightfright is scary.

Villain: Nightfright/Arcus Fentonpoof

Lonely, Velma investigates a anonymous tip about "Fish Freaks" haunting an abandoned Destroido oil rig. She is attacked by the Fish Freaks, and discovers a mermaid called Amy sent the tip. Velma enlists the help of the gang, only for them to get captured. They discover the Fish Freaks are attempting to drill for oil, which would cause a major environmental disaster. The gang stops the Fish Freaks, who are revealed to be Ernesto and the activists, who wanted to sell the oil to fund their projects. Amy reveals herself to be human. She went in disguise to get Velma to help rescue her husband, who was kidnapped by the Fish Freaks. Thanks to her, Velma realizes Angel is not who she says she is, but is instead Cassidy Williams of the original Mystery Incorporated.

Villain: Fish Freaks/Ernesto and his group of activists

Note: Scrappy-Doo and Flim Flam make cameo appearances in the Haunted Museum as statues. Ernesto is a parody of Che Guevara.

Mayor Jones buys an ancient Persian temple for Crystal Cove's Creepy Spooky Terror Land, only to find it haunted by a manticore who begins attacking visitors. Desperate, Jones asks Fred and the gang to help. The gang investigates, realizing the manticore is fake. Meanwhile, they discover the website Jones bought the temple off of is also fake, and was designed just for the mayor to make the purchase. The gang traps the manticore, revealing it to be Marcie, aka Hot Dog Water, who wanted the park closed so she could melt it down and process it into an expensive super helium. While the gang investigates, Jones snoops around Fred's room, looking for the disk piece.

Villain: Manticore/"Hot Dog Water"

Note: "Hot Dog Water" is voiced by Linda Cardellini, who played Velma in the two live-action theatrical films.

Fred's hero, adventurer Dr. Rick Spartan, begins teaching a biology class at Crystal Cove. Fred introduces himself and the gang, and Spartan invites the gang for dinner. At dinner, Spartan shows the gang his latest find--a cursed shrunken head. The headless body then attacks, threatening to hunt Spartan forever. After surviving a brutal attack, Spartan decides to give up adventuring. The gang suspects Spartan's partner Cachinga, but the Headless Horror attacks again. The gang traps the monster, revealing it to be Spartan's wife Marion, who wanted him to stop adventuring.

Villain: Headless Horror/Marion Spartan

Mayor Jones becomes the victim in seemingly paranormal activity in his house, prompting the gang to investigate. Velma finds sunflower seeds, while hidden camera reveal the mayor is partially faking the attacks. The gang also discovers the mayor has a puzzle piece similar to the one they got from Danny. Eventually, the gang discovers Pericles is the villain, and is trying to get the mayor's piece, which he claims the mayor stole from him long ago. Pericles manages to escape with the piece.

Overarching Mystery Events: The gang is made aware of a second piece of the disk, as well as Pericle's and Jones' involvement.

Villain: Shadowy Figure/Professor Pericles

The gang is in pursuit of the Piranha-Goat when the ghost of Crystal Cove's greatest sheriff, Iron Will Williamson, colloquially known as Dead Justice, captures the villain and gets the praise. After many more successes, Dead Justice is promoted to sheriff and receives an award Stone has held for years. Desperate to get his job and standing back, Stone teams up with the gang. They realize one of Stone's former deputies has drawings resembling Dead Justice's bullets and failed the sheriff's exam multiple times. They trap him, and Stone is reinstated. At the Clam Cabin, Fred and Daphne become engaged.

Villain: Ghost of Dead Justice/Deputy Bucky

The gang is attacked by a hi-tech assassin called the Obliteratrix, who tells them that they all have to die. This leads the gang to investigate the mystery of the Cursed Treasure further with the assistance of Professor H.P. Hatecraft (who suspects his rival Regina Wentworth to be the Obliteratrix). Along the way, they discover the fate of the original Mystery Incorporated. Angel traps the Obliteratrix, revealed to be Alice May, who was acting on orders from Mr. E. Unknown to the gang, a mysterious creature called "The Freak of Crystal Cove" watches them from the shadows, saying that in the end, the curse will end with them.

Overarching Mystery Events: Details on the purpose of the disk and the truth behind the fate of the original Mystery Incorporated. Angel reveals her true identity to the rest of the gang. The Freak of Crystal Cove is revealed to the viewer.

Villain: Obliteratrix/Alice May

The gang looks into the treasure beneath Crystal Cove, but are attacked by the Freak. They find the treasure in the caves below town, but are followed by Pericles and the Freak. The Freak steals the gang's piece and they chase after him. Fred is saved from falling to his death by the Freak, who is captured shortly afterwards. Fred pieces everything together, revealing The Freak to be Mayor Jones, who has been after the treasure since his arrival in Crystal Cove. Jones reveals that Fred's parents are actually Brad Chiles and Judy Reeves of the original Mystery Inc. Breaking off his engagement, Fred leaves to search for his true parents. Shaggy is sent off to military school, while Scooby is sent to a farm. As the gang is breaking up, Scooby encounters Pericles, who has both disk pieces. Scooby vows to get the gang back together and stop the bird.

Overarching Mystery Events: It is revealed that Mayor Jones forced the original Mystery Inc. to leave town, taking in Brad and Judy's son to ensure they wouldn't return. The gang breaks up again, and Pericles is revealed to have the disk pieces.

Crystal Cove comes under attack from a giant man-baby clown named Crybaby Clown. The town's new mayor Janet Nettles is approached by a mysterious figure who tells her the only way to save Crystal Cove is to enlist the help of the disbanded Mystery Inc. Nettles finds Scooby, already in the process of breaking out of a prison-like farm. They work together to recruit Shaggy and Fred, and the mysterious figure is revealed to be Velma. They are unable to get Daphne, as she is focused on her relationship with celebrity Baylor Hotner. Crybaby Clown attacks at a town meeting where the gang reveals their return. Fred comes up with a trap involving a donut shop, but his misguided faith in Daphne causes the trap to fail, and Crybaby Clown escapes.

Villain: Crybaby Clown

In Russia, Velma and Hot Dog Water are on a mission for Mr. E to retrieve a piece of the disk from the house of Baba Yaga. They fail, and the house comes to life and attacks. Later, the house is transported to Crystal Cove to be displayed in a museum, where it comes to life and runs away. The gang, now including Hot Dog Water, finds it in the woods and investigate. It comes to life again, but not before the gang finds a strange liquid leaking from the house. They manage to stop the house, revealing the villain to be museum curator Vronsky who was using the house to smuggle faberge eggs. The gang also finds the third piece of the disk, which Velma refuses to give to Mr. E.

Overarching Mystery Event: The gang gets the third piece of the disk. Mr. E is revealed to be actively hunting disk pieces. Velma is revealed to have been working with Mr. E.

Villain: Baba Yaga/Curator Vronsky

Crybaby Clown returns to Crystal Cove to kidnap a therapist, a hairdresser, a plastic surgeon, and a publicist. Velma realizes that Crybaby Clown may escape soon. Seemingly unrelated, Daphne and Baylor are planning a trip to Africa. Crybaby Clown takes Daphne, further motivating the gang to stop him. The gang chases Crybaby Clown to the airport, where they trap him. He's revealed to be Baylor, who wanted to build up his posse, and Daphne dumps him. She asks to rejoin the gang, and is accepted. Meanwhile, Mr. E tries to recruit Cassidy, but she's done with him and Mystery Inc. He tells her that "they" are coming for Fred.

Villain: Crybaby Clown/Baylor Hotner

Overarching Mystery Event: The gang reuinted. Mr. E tries to recruit Cassidy, but she says she's done with him. He reveals that people are coming for Fred.

Hot Dog Water is voted out of the gang, much to Velma's dismay. Meanwhile, a creature called the Dreamweaver begins haunting people's dreams, resulting in them destroying their most prized possessions. His strange whisperings reveal that he's a character from Crypts and Creatures, which Shaggy used to play. Stone also used to play the game, and realizes he's the Dreamweaver's next victim, as all the other victims were people he played with growing up. The gang realizes that the drawing of the Dreamweaver suggests he's right-handed, while the monster in people's dreams is left-handed. The gang invades the dream of the Dreamweaver, revealed to be victim Horbert Feist, who wanted revenge for losing his Crypts and Creatures character years ago.

Villain: Dreamweaver/Horbert Feist

Gene Shepherd's Traveling Curio Cabinet of Curiosities brings a Hodag of Horror to Crystal Cove who comes to life and begins stealing from people. Meanwhile, Brad Chiles and Judy Reeves return, and all of Crystal Cove's elites attend a party hosted by the Blakes celebrating their return. Scooby falls in love with their dog, Nova. Daphne returns their locket, and the Hodag attacks, kidnapping Nova. The gang notices how a bell always rings before the Hodag attacks, and trap it. It's revealed to be cheese store owner Ned Fussbuster's assistant, Roberto, who is actually a monkey trained to steal jewelry. Fussbuster needed Roberto to steal Shepherd's key, as he owns a wheel of 500-year-old cheese. Fussbuster threatens to harm Nova, but Scooby saves her. Shepherd reveals the cheese told him to come to Crystal Cove. The gang breaks the wheel in half, revealing a piece of the disk inside. Elsewhere, the original Mystery Inc. is called together by Pericles, who has a proposition for them.

Overarching Mystery Event: The fourth piece of the Planispheric Disk. The original Mystery Inc. reunites.

Villain: Hodag of Horror/Roberto the Monkey (under the control of Ned Fussbuster via ringing bells)

Modern artist Randy Warsaw presents his latest work of art, "Junk" to Crystal Cove. However, it comes to life and begins turning people into gold statues. Nettles asks the gang to solve the mystery, giving them an office in town hall. When the gang goes to the museum to investigate, everyone but Daphne is employed by Warsaw. Daphne investigates on her own, but is attacked by Junk. In their office, the gang realizes that the gold statues are arranged like the main subjects of a painting, and the music playing whenever Junk attacks is a polka song slowed down. The gang traps Junk, freeing the people it supposedly turned to gold, and revealing Junk to be Butch Firbanks of the band who played at the exhibit, who wanted revenge on Warsaw for altering his image.

Villain: Junk/Butch Firbanks

A graveyard ghoul attacks the audience during Nettles' Horror Movie Night in the cemetery. The gang investigates and meet the owner of the cemetery, along with her three daughters. Fred and Shaggy become enamoured with them, while Daphne falls into a chocolate addiction. Velma and Scooby go alone to investigate, suspecting Evallo the gravedigger. Fred thinks it's dumb of Velma to suspect the obvious suspect, but Velma ends up being right. Evallo was trying to steal gas from Crystal Cove. With the revelation of gas on the mother's property, she becomes wealthy and decides she and her daughters will leave Crystal Cove. Cassidy begins a radio broadcast where she talks about evil in Crystal Cove. Mr. E and Pericles reflect and decide Cassidy must go.

Overarching Mystery Event: It is revealed how Mr. E and Professor Pericles met each other. Now working together, they decide to kill Cassidy.

Gary and Ethan are attacked by the Dark Lilith on Mount Diabla and lose the soccer team's lucky soccer ball. As the gang investigates, the monster attacks them and a band of hillbillies at their camp in nearby Scorpion Ridge. One of the hillbillies, "Ugly Jimmy", catches Daphne's eye as he is handsome unlike the rest of the tribe. Jimmy decides to help the gang solve the mystery. The gang falls into a cave and meets amnesiac explorer Boron, who has the lucky ball and believes it to be her lover. She leads the gang to the Dark Lilith's hideout after the monster attacks Jimmy. The hideout turns out to be an old Spanish galleon infested with traps. The gang finds the ship's log, makes it past the traps, and finds the fifth piece of the disk. Velma discovers Hot Dog Water is Lilith, who is still working for Mr. E, but she lets Velma keep the disk piece. The gang drives off unaware they're being watched by the ghost of a conquistador which says the single word "Nibiru" before fading away.

Overarching Mystery Events: The ship's manifest, bearing the journals of the conquistadors who founded Crystal Cove, which describe their discovery of the treasure (a crystal sarcophagus filled with black pearls) that became the evil beneath Crystal Cove (which they named for the sarcophagus) and their use of the Planispheric Disk to mark its location after its burial; the fifth piece of the Disk.

Villain: Dark Lilith/"Hot Dog Water"

The ghostly Puritan judge Hebediah Grim begins judging the young women of Crystal Cove. The gang initially suspects Ethan, believing him to be working with Gary to save girls from fake monster attacks. They investigate, but Ethan is cleared after he saves them from Grim. Grim continues to judge, and the gang comes to suspect drama student Doogle McGuineness. However, Grim attacks when the gang goes to confront Doogle. Brad and Judy offer to help trap Grim. They succeed, revealing there to be two Grims--Ethan and Gary. Daphne and Fred reveal they still like each other, while Nettles and Stone begin dating. Elsewhere, Cassidy spies on the gang, Brad, and Judy.

Villain: Hebediah Grim/Gary and Ethan

The gang get stuck in the mountains, and seek lodging at the Burlington Library, where its caretaker Dan Fluunk introduces the mansion's history and the fascination of groups of four mystery solvers and an animal. As the night continues, the gang begin seeing strange and haunting things. Velma realizes the hallucinations are caused by the smoke of a special kind of wood. They capture the wood-burning fiend, revealed to be Fluunk. He reveals that he hates being the library's caretaker, and schemed to use the smoke to scare visitors away and force the library to close. As the gang leaves, a book containing information on the disk is thrown from the window. Elsewhere, Cassidy searches for information on mystery solving groups.

Overarching Mystery Events: The repeating pattern of mystery-solving groups--including the Darrow family and both incarnations of Mystery Incorporated--being haunted by the Planispheric Disk and the treasure it leads to, all of them consisting of four sleuths and an animal mascot; the Planispheric Disk user manual.

Villain: Fiend/Dan Fluunk

A World War II Nazi robot attacks Cassidy at her radio station. She goes to the gang for help, explaining robots have been attacking her for weeks. The gang discovers they're coming from under the sea, so Daphne recruits her babysitting charges, Tom and Tub to take them to The Midnight Zone. As they approach The Midnight Zone, the gang is attacked by robots. They stumble upon a base, where the robots are being manufactured. They discover the corpse of Abigail Gluck, a former member of the Benevolent Lodge of Mystery, who says "Nibiru", then discover Pericles is behind the robots. They escape as the base begins self-destructing, but Cassidy stays behind to hold open the jammed door. Everyone returns to the surface except Cassidy. Pericles gets the sixth piece of the disk.

Overarching Mystery Events: The lost original settlement of Crystal Cove, which vanished over three centuries ago, now submerged beneath the sea; its inhabitant missionaries were the conquistadors who were the source of Crystal Cove's curse; the base revealed to have been constructed by Frau Abigail Gluck, a member of an old mystery-solving group, the Benevolent Lodge of Mystery; her body whispers "Nibiru" upon its discovery; the final piece of the Planispheric Disk, found by Professor Pericles.

Villain: Kriegstaffelbots and Sea Specter controlled by Professor Pericles

A bear-like creature has been stalking the grounds near Destroido for weeks. The gang investigates, discovering Destroido has allowed toxic lithium to spill into the nearby water. This has destroyed the avocado farm of George Avacados, who the gang suspects. The gang steals an ID badge, and breaks into Destroido's lab, where they find hundreds of experiments on animals. They're attacked by the Scarebear and narrowly escape. At a Destroido event, the bear attacks again, and is revealed to be a Benson Fuhrman, a victim of a faulty product Destroido released knowing its defects. A bomb is found at the event, but Fuhrman claims it isn't his. The gang launches it away from Destroido, accidentally blowing up the avocado farm. Mr. E is revealed to have been behind the bomb, and he, Pericles, Brad, and Judy conspire to steal the disk pieces from the gang.

Villain: Scarebear/Benson Fuhrman (Hairmore)

Krampus is attacking children, leaving their hair snow-white. The gang investigates, realizing Krampus is attacking "bad kids". They head to the Roller Rink and Arcade, where Krampus attacks again. Meanwhile, Brad and Judy attempt to steal disk pieces from the gang. When the gang fails to trap Krampus, they enlist the help of Mary-Ann Gleardon to use a bait, only for Krampus to attack and kidnap her. The gang traps Krampus, revealing him to be a robot. Brad and Judy are successful in stealing the gang's disk pieces, only to return to Ricky's headquarters and find their disk pieces gone. A video from the gang reveals that they created Krampus with the help of Jason Wyatt so the original Mystery Inc. would think they had the perfect opportunity to steal the gang's disk pieces. Fred hid the real disk pieces with former Mayor Jones, while Brad and Judy stole replicas. Fred planted a bug on Brad to get Ricky's password, then Velma sent Hot Dog Water to steal Ricky's pieces while Ricky was focused on the gang and Krampus. The gang, who now has all pieces of the disk, assembles it. In the caves, the crystal sarcophagus emits the word "Nibiru".

Overarching Mystery Event: Velma finds that the word "Nibiru" refers to an ancient Babylonian prophecy of a collision between Earth and a large planetary object known as "Planet X," whose inhabitants were the first recorded instances of gods. The gang steals Ricky's disk pieces, and assembles the disk.

Villain: Krampus/Charlie the Robot, controlled by Jason Wyatt for Mystery Incorporated

Five years ago, a gigantic dragon robot is seen attacking Quest Industries, leaving security guard Radley Crowne's dog, Reggie, injured. Quest works to save the dog. In the present day, the same robot attacks the gang at City Hall. They're saved by Blue Falcon and Dynomutt, who have been tracking the robot for years. The two groups team up to stop the robot. They discover that Quest Industries is now owned by Destroido, and that the robot wants the Quest X Power Source, which was used to revive Dynomutt. The robot accidentally takes Scooby as he is wearing Dynomutt's belt, prompting the team to follow using a tracking device. They arrive on the island, where they defeat Dr. Zin, who wanted the Heart to save his daughter, and save Scooby.

Overarching Mystery Event: Velma's primitive recorder, used on the Planispheric Disk, yields the word "Nibiru".

Villains: Dragon Battle Suit/Jenny Zin, Dr. Zin

A production on the sinking of Crystal Cove is attacked by the ghost of Friar Gabriello Serra. Van Ghoul is called upon to revive the production, then calls the gang for assistance. The gang notices George Avacados working as a janitor, and suspects him. With Shaggy and Scooby as the leads, the gang helps put on the play, only for the ghost to attack on opening night. The gang traps it, revealing Avacados to finally be the villain who was searching for the lost Avacados diamond. The real ghost of Serra suddenly appears and explains how he was part of the first mystery solving group, Fraternitas Mysterium, which became a victim of the disk and the curse. It was his donkey Porto who destroyed them all, causing the settlement to sink. Serra warns them of Nibiru, then repeats the warning "the dog dies", as it is the animal mascot who lead his group to downfall.

Overarching Mystery Events: It is revealed that Serra's corrupted donkey Porto sent the original Crystal Cove settlement into the ocean, not an earthquake as was originally believed. Serra's ghost warns the gang about evoking the memory of "Nibiru". Serra's statement of "Heed the warning of the alligators" is a reference to the hotel sign in Gatorsburg reading "The dog dies!" in "The Creeping Creatures".

Villain: Ghost of Friar Serra/George Avacados

As the gang makes progress on the disk, Stone recalls a childhood event where he was abducted by aliens. The gang begins investigating, when three real aliens begin stealing valuable items from Crystal Cove. Velma realizes that the statures of the three aliens resemble the statures of three wanted individuals listed in the police station. The gang traps the aliens, revealed to be wanted thiefs using alien disguises, and returns to the disk to find it has given them coordinates to a cemetery in Gatorsburg. At the cemetery, they find an old flintlock. When they return to Crystal Cove, they find their office ablaze. Brad and Judy, implied to be the arsonists, watch from afar.

Overarching Mystery Events: Velma's primitive recorder, used on the Planispheric Disk, yields the phrase "Señor P. Llave", and the coordinates to the Gatorsburg cemetery; upon reaching Señor Llave's grave, the gang finds it empty, with only an old flintlock left in it. Velma realizes the flintlock is the "first key". At the request of Pericles, Brad and Judy have destroyed the gang's office.

Villains: Grey Alien/Traveler O'Flaherty, Nordic Alien/Sheela O'Flaherty, Reptoid/Connor O'Flaherty

Professor Pericles creates a herd of mutant cattle (which he had bred from cattle, piranhas, and bees) to destroy Crystal Cove in an attempt to locate the Planispheric Disk. As the herd begins devouring the town, the gang, Mayor Nettles, and Sheriff Stone use Ex-Mayor Jones' helicopter to trap the herd's queen. The cattle follow the gang as they leave town in an attempt to protect their queen. Watching from afar, Professor Pericles orders Brad and Judy to shoot the helicopter down. The missile strikes the chopper and as Mayor Nettles attempts to land safely, Nova falls out and is nearly trampled to death by the herd. The queen cattle is dropped into the ocean as the herd scatters. Scooby-Doo then has everyone get Nova to the hospital.

Villains: Skull Cattle created by Professor Pericles

Deceased ska band Rude Boy and the Skatastics returns from the grave, and hypnotizes partygoers at a local nightclub to dance to their music. The dancers are taken to the hospital, whereupon the gang is called to solve the mystery before they dance themselves to death. Meanwhile, since her accident with the herd, Scooby has been visiting Nova regularly in the hospital. Eventually, the band hypnotizes Fred and the girls, forcing Scooby and Shaggy, who are immune to the music, to turn to the Hex Girls for help. They work together to fight off the band in a giant supernatural band battle, ending with the Skatastics' defeat. They are revealed to be the actual Rude Boy and the Skatastics, who wanted to revive ska by using hypnotic music. The Hex Girls help decipher a clue on the Planispheric Disk that leads them to an old helmet. Meanwhile, Scooby visits Nova in the hospital, only for her to awaken and utter a cryptic warning before falling asleep.

Overarching Mystery Events: The gang discovers a musical phrase that has appeared on the Planispheric Disk. When the Hex Girls sing the phrase, the Disk reveals another set of coordinates, which leads the gang to the Clam Cabin. They find that Skipper Shelton's hat (given to him by Handsome Jimmy from "Night on Haunted Mountain") bears the name "S. Llave" written under the brim, which they discover is the second key. Scooby visits Nova in the hospital, only to see her flatline. Just afterward, she sits up in bed and says "Nibiru. Nibiru is coming", before regaining life.

Villains: Ska Zombies/Rude Boy and the Ska-Tastics

A gluttonous monster attacks Francilee Jackson on her cooking show. As the gang attempts to eat dinner together, the restaurant is crashed by Rick Spartan and Cachinga, who are on the hunt for the monster. The monster attacks various locations around Crystal Cove, including various restaurants and the museum where Velma's mom works. Fred and Spartan build a trap for the demon, Scooby and Shaggy work to eat all the food in town to lure the demon into the trap, and Velma, Daphne, and Cachinga actually investigate the mystery. They discover the monster to be Francilee Jackson, who was removing the competition to open her own restaurant. Meanwhile, Professor Pericles has gone crazy, leaving Mr. E to attempt to seek the treasure without him. Brad and Judy tell Pericles of E's mutiny, and Pericles uses venom injections to force Mr. E to work for him.

Overarching Mystery Events: Francilee Jackson drops her bowl as she is escorted away and the bowl is revealed to bear the words "Tercero Llave" on its underside.

Villain: Gluten Demon/Francilee Jackson

A family vacationing in the mountains near Crystal Cove is attacked by a polite Englishman in a mask calling himself the Dandy Highwayman, who blows up the family's station wagon and leaves with the mother. Later, the gang stumbles upon the wreckage of several cars on the mountain roads and decides to investigate. As they investigate, the Highwayman kidnaps several women from around Crystal Cove, including Mayor Nettles, Daphne, and Mrs. Blake, and steals all of the money from the Blake safe. With inside help from Daphne (who is safe and sound in the Highwayman's lair), the gang traps the Highwayman, revealed to be a lonely librarian who wanted to have a more exciting and adventurous life.

Overarching Mystery Events: While the gang is researching the Dandy Highwayman in the town library, Scooby awakes from another nightmare and knocks the book he is reading off of the table, dislodging a piece of cloth from within the book which bears the words "Cuarto Llave" written on it. Scooby has been having nightmares since Nova's accident. In Scooby's latest nightmare, a being speaking through Nova warns him of the coming of the Anunnaki at the time of Nibiru and warns him that his life is in danger, telling him that he and his friends must destroy the cursed treasure beneath Crystal Cove. Scooby then informs his friends about his dream.

Villain: Dandy Highwayman/Crystal Cove Librarian

As the gang investigates a haunted house, a man resembling Fred pulls him through a mirror and takes him to a world where the Planispheric Disk destroyed all of Crystal Cove. In the real world, the Fred impostor leads the gang on a wild goose chase, causing the gang to suspect something is amiss. The real Fred encounters an aged Daphne, but realizes the entire thing is a ruse and escapes from the fake town, reuniting with the gang. The Freds fight over the Planispheric Disk, and the fake Fred and Daphne are revealed to be Brad and Judy, working with Professor Pericles to obtain the disc. Pericles uses the Kriegstaffelbots to threaten Daphne in order for the Planispheric Disk to be surrendered to him. When Professor Pericles gets the Planispheric Disk, he makes plans to free his "master".

Overarching Mystery Events: Professor Pericles appears to be serving the Evil Entity sealed within the crystal sarcophagus, and has been on a mission to gain access to the Planispheric Disk in order to set the being free.

Villains: Fake Fred/Brad Chiles, Fake Daphne/Judy Reeves, Kriegstaffelbots

When a monstrous version of the Freak of Crystal Cove begins appearing in Scooby's nightmares, the gang decides to investigate what is going on. They seek the help of the reclusive hypnotist Professor Horatio Kharon (author of the book Velma has been reading), who has also been seeing the Freak within his dreams as well as appearing in Scooby's. After being hypnotized to enter the dream world, the gang is chased by the Monstrous Freak throughout the dimension. They soon discover the evil entity that was trapped with the cursed treasure, and how previous mystery groups and the people affiliated with the treasure have been manipulated by the entity. The gang traps the monstrous Freak, revealed to be El Aguirre, who wished for him and his men to remain cursed as punishment for their deeds. The being speaking through Nova tells Mystery Incorporated that they must find the Heart of the Jaguar in order to destroy the Evil Entity sealed within the crystal sarcophagus.

Overarching Mystery Events: The good personality components of all members of previous mystery groups and the people associated with the cursed treasure (among them ex-Mayor Fred Jones Sr., Ed Machine, Cassidy Williams, Ricky Owens, Brad Chiles, and Judy Reeves) were sent to the dream dimension where they remained to stay. The very first mystery group, the Hunters of Secrets, was first manipulated by the entity within the sarcophagus; however, they were pure and realized they were being manipulated. They attempted to destroy the entity with a relic referred to as the "Heart of the Jaguar", but never succeeded due to the conquistadors' interruption. The Keys are being used by previous mystery groups (such as the Darrow Family, the Alianza Mysterio, the Fraternitas Mysterium, the Mystery Gang, and the Benevolent Lodge of Mystery) when the gang visits them in the dream world, symbolizing their use with the gates to the cursed treasure. If they destroy the entity, everyone from the dream world would be set free from the curse.

Villain: Monstrous Freak/The Ghost of Fernando El Aguirre

The gang, accompanied by Velma's mom, goes to the Yucatán in an attempt to search for the Heart of the Jaguar after Angie's old friend, Professor Enrique Andelusossa, is "consumed by the jungle" near the Temple of the Hunters (the burial site of the Hunters of Secrets where the Heart of the Jaguar is kept). Upon arriving in the Yucatán, the gang visits Professor Enrique's antique shop, where they are greeted by his angry wife, who says Mrs. Dinkley is to blame for his disappearance. After hours, the gang returns to the store, only to be attacked by the Mayan Priestess, who warns them away from the temple. The gang ignores her threat and travels into the jungle to find the temple. Due to Fred's master trap skills, Mystery Incorporated overcomes the temple's diabolical traps and discovers the Heart of the Jaguar in the tomb. The Priestess attacks, but is captured by the temple's traps. She is revealed to be Andelusossa, who wished for Angie to return. Afterward, Lieutenant Tomina Kasanski (a woman who had been spying on the gang) appears but is revealed to be working with Mayor Nettles.

Overarching Mystery Events: The gang finds the Heart of the Jaguar, the spear used by the Hunters of Secrets that is able to destroy the evil entity trapped in the crystal sarcophagus. Mayor Nettles had a nightmare telling her that the gang would need her help in transporting the Heart of the Jaguar back to Crystal Cove.

Villain: Mayan Priestess/Professor Enrique Andelusossa

Once the gang returns to Crystal Cove, they find out that everyone in town has disappeared below ground. Later that day, after witnessing Mayor Nettles and Sheriff Stone vanish, the gang goes to Fred's house to discuss the Planispheric Disc, Nibiru, the cursed treasure, and an upcoming planetary alignment. After the interruption of Kriegstaffelbots, the gang sets off beneath Crystal Cove and discovers everyone in town forced to work for Professor Pericles and the rest of the original Mystery Incorporated. After hearing a conversation between the old Mystery, Inc., the gang is convinced they have gone crazy, and devise a tactical plan to bust everyone out and shut down the operation. Shaggy and Scooby go undercover as Kriegstaffelbots, while Fred and the girls attack in a suited-up Mystery Machine. After the word is spread, Sheriff Stone has everyone rebel against the Kriegstaffelbots and go on a riot. Soon, the Kriegstaffelbots stop Fred, Velma, and Daphne in their tracks, forcing them to blow up the Mystery Machine (in which everyone thought they were). After all is resolved and the doorway is opened to the cursed treasure, the gang gears up with the relics and follows the original Mystery Incorporated into the caverns.

Overarching Mystery Events: The passageway to the cursed treasure is found and opened. Professor Pericles confirms Cassidy's death to a troubled Mr. E, who is worried about her and is saying she was right the entire time. Velma's computer model of the Planispheric Disc perfectly mirrors the planets in the solar system. The planets are coming into direct alignment and the tenth planet, Planet X, is getting closer and is about to come into alignment behind Pluto and will cause massive gravitational disruption, one not seen in 5,000 years. The time of Nibiru happens in two days. The gravitational disruption makes the fabric between dimensions of time and space weak, which is why the evil entity buried beneath Crystal Cove must be destroyed. Along with destroying the entity, the Heart of the Jaguar will undo all of its evil.

Villains: Professor Pericles, Brad Chiles, Judy Reeves, Mr. E, and the Kriegstaffelbots

As the gang follows the original Mystery, Inc. through the caverns, they all approach the first gate to the cursed treasure. Professor Pericles knows the gang has been following them, as he calls them out to bring the Keys in order to open the gates. The gang realizes that the Keys and their scenarios seen in the dream world is how they all apply to the gates. The gang is forced to cooperate after Pericles reveals they have Hot Dog Water. Fred uses a trap built into the gate to distract Pericles, and Hot Dog Water captures him to buy the gang time to escape, although she killed by the Kriegstaffelbots shortly after. The gang arrives at the second gate and opens it using the mortar bowl. They enter a mysterious rock dimension, where they are greeted and chased by a Rock Monster. After the monster's defeat, the gang comes before the third gate, which is opened using the conquistador's helmet. The gate releases water trapped behind and the gate turns into a boat, allowing the gang to escape and become stranded at sea. After learning that the next gate is below the water, the gang comes upon the final gate, which is opened using the flintlock. The gang enters the dimension, which is teeming with lava, and comes upon the crystal sarcophagus and cursed treasure. The Evil Entity sealed within tries to manipulate the gang into opening the sarcophagus to free it, but the gang realizes the words the being is speaking are not true. Suddenly, Pericles and the original Mystery Incorporated arrive and Pericles opens the sarcophagus, releasing the Evil Entity.

Overarching Mystery Event: The Evil Entity which was sealed in the crystal sarcophagus is released from its imprisonment. It tells the gang that it brought them together as it brought together those groups before them, solely for the purpose of releasing it; the gang realizes that everything the Entity is saying is untrue.

Villains: Professor Pericles, Mr. E, Brad Chiles, Judy Reeves, Kriegstaffelbots, Rock Monster, Evil Entity

The gang and original Mystery Incorporated stand before the Evil Entity. The Entity grabs Scooby-Doo and mentions that he must die and be reborn as a vessel for its darkness. Scooby breaks free, but Pericles volunteers to be possessed by the being, to which the Entity agrees. Professor Pericles believes he has gained ultimate power, but the Evil Entity kills Pericles and mutates his body into a squid-like monster. The Entity then consumes Brad and Judy and assumes control of the Kriegstaffelbots before consuming Mr. E and summoning other evil Anunnaki, who proceed to offer the townspeople for the Entity to consume. Scooby tries using the spear on the entity, but it shatters. The gang realizes that their friendship is the Heart of the Jaguar, and work together to get close to the sarcophagus. When Scooby destroys the sarcophagus, a vortex opens and sucks in and destroys the Entity, his minions, and much of the rest of Crystal Cove. The gang awakens to find themselves in a new version of Crystal Cove and Earth itself. After some strange encounters, Mystery Incorporated realizes that all the evil caused by the Entity has come undone, thereby changing history. The gang sets up a new Mystery Machine and travels off to Miskatonic University after receiving a message from Harlan Ellison, who is the new Mr. E and reveals he still remembers the previous timeline. The gang vows to solve each mystery they come across. As the gang drives away, they are watched by Nova, who says Scooby is the bravest dog that ever lived and thanks him and the gang.

Overarching Mystery Events: The overall mystery is solved. By destroying the Evil Entity, the gang created an entirely different timeline. No one has been negatively influenced by the Evil Entity. Everything has come undone; the gang's actions have created a perfect world where they live productive and normal lives and all the villains never committed their crimes and Cassidy, Hot Dog Water, Brad, Judy, Pericles and Ricky are alive. Harlan Ellison, who is now called Mr. E, contacts the gang and tells them he knows who they are. He knows that they created an alternate timeline by destroying the Evil Entity, due to him being a genius and his hyper-tuned psychic and hypnotic connections with alternate dimensions, which is why he is able to remember every timeline ever created. He also mentions that the gang has slipped the timestream with him. He has admitted the gang (including Scooby) at Miskatonic University to be in his class next semester and he mentions there is a lot of "meddling" to do and a lot of mysteries to be solved.

Villains: Evil Entity, Kriegstaffelbots, the Entity's Anunnaki slaves