Harry Alan Towers was a British radio and independent film producer and screenwriter. He wrote numerous screenplays for the films he produced, often under the pseudonym Peter Welbeck. He produced over 80 feature films and continued to write and produce well into his eighties. Towers was married to the actress Maria Rohm, who appeared in many of his films.

And Then There Were None is a 1974 mystery film and an adaptation of Agatha Christie's best-selling 1939 mystery novel of the same name. The film was directed by Peter Collinson and produced by Harry Alan Towers. This was the second of three versions of Christie's novel to be adapted to the screen by producer Harry Alan Towers. Two film adaptations were previously released. An American made-for-television version was broadcast in 1959. Towers produced a third version in 1989.