Movie trailer for the 1967 British B-Movie Berserk! starring Joan Crawford, Ty Hardin, and Judy Geeson. The movie tells the story of Monica Rivers (Crawford), owner and ringmaster of a traveling circus. When a series of mysterious murders begins to happen and some of her performers die in gruesome fashion, Rivers sees her profits soar. Happy about the rise in business and her lack of concern about the deaths, suspicion grows about her role in this. An interesting side note on this film is the fact that the circus footage is actually of the famous real-life Billy Smart's Circus. The movie was released in September 1967.