Expansion This needs a stretch. (Feel free to remove when satisfied of completion.)

Season 1 of Scooby-Doo and Guess Who? began streaming on the Boomerang VOD service from June 27, 2019.



Number Title Airdate Guest stars Suspects Culprits Monsters
1 Revenge of the Swamp Monster! June 27, 2019 Chris Paul Teacher, Burt Friendly, Arthur C. Habberknackles, Hadlee P. Jones Caddy Swamp Monster
Shaggy becomes the unlikely caddy of celebrity basketball player Chris Paul, when the latter enters a charity golf tournament to help an art school, which is not only on the brink of closing, but also haunted by a swamp monster.
2 A Mystery Solving Gang Divided July 2, 2019 Abraham Lincoln Ebb Jebb Ghost sergeant
Scooby-Doo and the gang travel to a historic battlefield in Pennsylvania to investigate the mysterious appearance of ghost zombie Civil War soldiers and come face to face with a rival mystery-solving gang, learning an important lesson about teamwork.
3 Peebles' Pet Shop of Terrible Terrors! July 11, 2019 Wanda Sykes Arnie Mr. Peebles Fish Monster
The kids stop at Peebles' Pet Supply Mega-Store to cure Scooby of his hunger for Scooby Snacks. The shop owner was attacked by a fish monster just a few minutes before the gang arrived. During the investigation, the gang gets saved by Magilla Gorilla.
4 Elementary, My Dear Shaggy! July 18, 2019 Crackpot Sherlock Crackpot Sherlock Security guard and the beefeater Screaming Skulls of London
While in London, the Mystery Machine is pushed off the road by a group of screaming, flaming skulls. The Gang end up meeting a man claiming to be Sherlock Holmes, so the Gang decide to solve the mystery with this "Holmes" who they state to be fictional.
5 Ollie Ollie In-Come Free! July 25, 2019 Ricky Gervais Old woman, assistant Antique dealer Cat Mummy
Mystery Inc. are called by British comedian Ricky Gervais to help with the Cat Mummy who is terrorizing him at his home.
6 The Scooby of a Thousand Faces! August 1, 2019 Wonder Woman Janitor Curator Minotaur
The gang and Wonder Woman face-off against a minotaur at a museum in Greece.
7 The Cursed Cabinet of Professor Madds Markson! August 8, 2019 Penn & Teller Demolition boss, Hugo Hauser, Tess Flemmings Teller as Hugo Hauser Ghost of Madds Markson
The gang hope to win a million dollars by spending a night in the haunted and soon to be demolished Savannah Hotel in Las Vegas, only to find that celebrity magicians Penn & Teller have accepted the same offer in the hopes of seeing the ghost of a famous magician.
8 When Urkel-Bots Go Bad! August 15, 2019 Steve Urkel Museum director, security guard, lunch lady Janitor Technomancer
Mystery Inc. meets Steve Urkel in Chicago when his Urkel-Bot goes haywire upon being reprogrammed by the Technomancer.
9 The Fastest Fast Food Fiend! August 22, 2019 Jim Gaffigan Rick Tally, old woman Bill Tally Spectral Speedster
Shaggy and Scooby intend to compete in Doc Tally's food eating contest, which requires participants to road race between restaurants to eat certain items. But the heat is on when food contest champion Jim Gaffigan enters the contest... and it only gets worse when the terrifying Spectral Speedster arrives to stop the race for good.
10 Attack of the Weird Al-Osaurus! August 29, 2019 Weird Al Yankovic Dr. Josephine Tuttle, Big Bob McAllister Pete and Pete Dinosaurs
When the gang travel to parody legend Weird Al Yankovic's accordion camp, they agree to help him get to the bottom of why dinosaurs have emerged from the nearby forest and driven the other campers away.
11 Now You Sia, Now You Don't! September 5, 2019 Sia Sia, businesswoman, Sia's housekeeper, Sia's manager Sia's trainer Sia Doppelganger
The gang come to the aid of Daphne's friend, music star Sia, who is suspected of a string of jewel thefts after security camera footage reveals the perpetrator looks exactly like her.
12 Quit Clowning! September 12, 2019 Kenan Thompson Contractor, Simone A.J. Dobbs Pazzo the Ghost Clown
Comedian Kenan Thompson and Mystery Inc. hope to save a local TV station in Thompson's home town through a telethon. However, they get more than they bargain for when the station manager doesn't mention that Kenan's favorite childhood memory - Pazzo the Clown - is now a terrifying ghost that haunts the station.
13 What a Night, for a Dark Knight! September 19, 2019 Batman Dr. Kirk Langstrom Joker Man-Bat
The gang go to Gotham City to visit Daphne's uncle, Alfred Pennyworth, but must convince Batman that they're innocent when he finds them at the scene of the crime when Alfred is kidnapped.
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