En un castillo delirante y fascinante viven los monstruos más conocidos de nuestro mundo. Un lugar en el que también encontramos a un terrorífico grupo de rock que interpreta diferentes canciones, cuentan chistes y hacen todo tipo de sketchs.

Groovie Goolies is an American animated television show that original ran on network television between 1970 and 1972. Produced by Filmation, Groovie Goolies was a spinoff of Sabrina the Teenage Witch Show. Like most Saturday morning cartoons of the era, Groovie Goolies contained an adult laugh track. In 1977, the show entered syndication as part of an anthology series entitled The Groovie Goolies and Friends, which featured over 104 half-hour episodes. The syndication format featured new opening credits and "bumpers" featuring the Goolies interacting with characters from the various shows, while the original end credits for each series was retained. The syndication package included The New Adventures of Waldo Kitty, Lassie's Rescue Rangers, The New Adventures of Gilligan, My Favorite Martians, M.U.S.H. , Fraidy Cat, and Wacky and Packy.