The Beast Must Die is a 1974 British horror film directed by Paul Annett. The screenplay was written by Michael Winder, based on the short story "There Shall Be No Darkness" by James Blish, which was originally published in Thrilling Wonder Stories. The film stars Calvin Lockhart, Peter Cushing, Marlene Clark, Charles Gray, Anton Diffring, Ciaran Madden, Tom Chadbon, and Michael Gambon.A millionaire big game hunter gathers six people at his remote English mansion, announcing that he suspects one of them is a werewolf. The viewer is invited to unfold the mystery along with the characters. Near the end, there is a 30-second pause called the "werewolf break", where the audience is asked to guess the werewolf's identity, based on clues from the movie. An alternative version of the film was released under the title Black Werewolf. This cut omits the "werewolf break" near the climax.