Clowns, clowns, clowns! This episode starts off with a dramatized clown urban legend, before exploring the long history of clowning that stretches back to ancient times, with a special emphasis on Joseph Grimaldi, the first modern clown. The fear of clowns is also delved into, as the psychological reasons for this fear is explained, as well as the real-life and fictional examples of those who've inspired it, like John Wayne Gacy, Pennywise, and the clown doll from 'Poltergeist'. The role of the clown in society is analyzed as well, from his appearance in Shakespare's plays down to the killer clown panics that began in the 1980s. Send in the clowns!