Detailinformatie over de film Secret Beyond the Door...

Robert Barber (Altar Boy), Tom Chatterton (Judge), David Cota (Small Mexican Knife Fighter), Frank Dae (Country Squire), Mark Dennis (David), Harry Denny (College President), Danny Duncan (Ferret-Faced Man), Robert Espinoza (Altar Boy), Paul Fierro (Fighter), Jesse Graves (Porter), Marie Harmon (Sub-Deb), Ralph Littlefield (Gothic Man), Donna Martell (Young Mexican Girl), Barbara O'Neil (Miss Robey), Natalie Schafer (Edith Potter), Anabel Shaw (Intellectual Sub-Deb)

Rufus King, Silvia Richards

Glenn E. Anderson, Leslie I. Carey

Bio-Kuva, Budd Rogers Releasing Corporation, Diana Production Company, Kinokuniya, National Telefilm Associates (NTA), Republic Pictures Home Video, Universal Pictures, Yleisradio (YLE)