The Deep Six is a 1958 American World War II drama film directed by Rudolph Maté, loosely based on a novel of the same name by Martin Dibner. The film stars Alan Ladd, who co-produced it, William Bendix, Dianne Foster, Keenan Wynn, James Whitmore, and Efrem Zimbalist Jr. It also marked the film debut of Joey Bishop. It was distributed by Warner Bros.

Alan Walbridge Ladd was an American actor and film producer. Ladd found success in film in the 1940s and early 1950s, particularly in films noir and Westerns. He was often paired with Veronica Lake in films noir, such as This Gun for Hire (1942), The Glass Key (1942), and The Blue Dahlia (1946). Whispering Smith (1948) was his first Western and color film, and Shane (1953) was noted for its contributions to the genre. Ladd also appeared in ten films with William Bendix.