"The Beast Must Die" is a 1974 British horror film directed by Paul Annett. The story follows a wealthy man named Tom Newcliffe, who invites a group of people to his remote estate for a weekend. Unbeknownst to them, he believes one of the guests is a werewolf and plans to hunt the creature down. The film is notable for its unique blend of horror and mystery, featuring a "werewolf break" that allows viewers to guess the identity of the beast. It stars actors such as Calvin Lockhart and Peter Cushing, and is based on the short story "The Beast Must Die" by James Blish.