Val Guest was an English film director and screenwriter. Beginning as a writer of comedy films, he is best known for his work for Hammer, for whom he directed 14 films, and for his science fiction films. He enjoyed a long career in the film industry from the early 1930s until the early 1980s.

Margaret Mary Day Lockwood, CBE, was an English actress. One of Britain's most popular film stars of the 1930s and 1940s, her film appearances included The Lady Vanishes (1938), Night Train to Munich (1940), The Man in Grey (1943), and The Wicked Lady (1945). She was nominated for the BAFTA Award for Best British Actress for the 1955 film Cast a Dark Shadow. She also starred in the television series Justice (1971–74).