Scooby-Doo and Guess Who? - Series 1: 21. Too Many Dummies!

NBA legend Chris Paul guest stars in the season premiere.

The gang come face to face with the ghost of Abraham Lincoln.

The gang hatch a monster egg with Wanda Sykes.

The gang team up with Sherlock Holmes in London.

The gang help Ricky Gervais with a haunted statue.

The gang team up with Wonder Woman in Greece.

In Gotham City, Batman refuses the help of Mystery, Inc.

The gang meet Penn and Teller in a haunted hotel.

The gang save Weird Al Yankovic from a dinosaur.

Can the gang survive Steve Urkel and his Urkel-Bot?

Shaggy and Scooby meet Jim Gaffigan in an eating competition.

Bill Nye helps a trapped Neil Degrasse Tyson.

The gang find themselves in a mystery involving SIA and an evil demon ghost.

Whoopi Goldberg needs help at Psychic University.

The gang helps Kenan Thompson with a ghost clown!

The gang help Mark Hamill face a Fox Monster in Japan.

Barry Allen/The Flash helps the gang solve mysteries Flash-style.

The gang meet George Takei in a haunted Hollywood mansion.

Shaggy competes against singer Halsey in a poetry slam.

The gang team up with Steve Buscemi in Sicily.

Dancer Maddie Ziegler needs help with a haunted studio.

Jeff Foxworthy needs the gang's help with a witch.

Malcolm McDowell takes the gang on a trip through time.

The Hex Girls need Mystery, Inc for a cursed guitar.

The gang join Christian Slater to stop a wolfman.