...Who? What A Night For A Dark Knight!: Scooby and the gang come to Gotham City to visit Daphne's 'Uncle' - Alfred Pennyworth - and stumble into a dangerous mystery. [S] S1 Ep1
...Who? Quit Clowning!: Shaggy and Scooby take the gang to meet their good friend, actor and comedian Kenan Thompson at a special one-man show that he's putting on in Atlanta. [S] S1 Ep14
...Who? The High School Wolfman's Musical Lament!: The mystery-solving gang teams up with famous actor Christian Slater to stop a Wolfman from ruining a do-over prom. [S] S1 Ep26
...Who? Dance Matron of Mayhem!: When famous dancer Maddie Ziegler wins an old and haunted dance studio in a competition, she asks her friend Daphne to investigate it. [S] S1 Ep22
...Who? Too Many Dummies!: Scooby and the gang are hired to escort a supposedly possessed ventriloquist dummy to the annual Ventriloquist Talent Competition. [S] S1 Ep21
...Who? Fear of the Fire Beast!: When Scooby and the gang are chasing a fire monster in Sicily, they are surprised to meet up with famous actor Steve Buscemi. [S] S1 Ep20
...Who? The New York Underground!: Shaggy is going up against famous singer-songwriter Halsey at a poetry slam contest in Central Park when a sewer monster attacks! [S] S1 Ep18
...Who? Hollywood Knights!: When Scooby and the gang investigate a haunted mansion in the historic Hollywood Hills, they meet up with famous actor George Takei. [S] S1 Ep17
...Who? One Minute Mysteries!: Scooby and Shaggy's eating buddy Barry Allen - The Flash - is sad about their interrupted food-fests, so he decides to solve mysteries Flash-style! [S] S1 Ep16
...Who? The Sword, The Fox, and the Scooby Doo!: Driving in Japan, the Mystery Inc. gang are stopped by famous actor Mark Hamill, who's in town for a high school reunion. [S] S1 Ep15