'Bedlam in the Big Top'

Mystery Inc. meets a strongman named Samson and a midget named Max, who were both on the run from a circus allegedly haunted by a ghost clown. The gang goes to the circus grounds to investigate, but one-by-one except Velma and Fred, fall victim to the Ghost Clown's powers of hypnotism. Scooby becoming a tight rope walker, Shaggy a lion-tamer and Daphne is hypnotized into wearing a tutu and to unicycle up a tightrope.