"One Million Years B.C." is a 1966 British film directed by Don Chaffey. The movie is set in prehistoric times and follows the story of a tribe of cave people as they struggle for survival against various challenges, including rival tribes and prehistoric creatures like dinosaurs. The film is notable for its special effects and the use of stop-motion animation, particularly in the depiction of dinosaurs, created by Ray Harryhausen. Despite its fantastical elements, the film explores themes of love, conflict, and the human condition in a primitive world.