Frankenstein: The True Story is a 1973 British television movie loosely based on the 1818 novel Frankenstein; or, The Modern Prometheus by Mary Shelley. It was directed by Jack Smight, and the screenplay was written by novelist Christopher Isherwood and his longtime partner Don Bachardy. The film stars Leonard Whiting as Victor Frankenstein, Jane Seymour as Prima, David McCallum as Henry Clerval, James Mason as Dr. Polidori and Michael Sarrazin as the Creature. James Mason's wife Clarissa Kaye-Mason appeared in the film.