Sheldon Reynolds Director, Screenwriter Patrick O'Neal Richard Cutting Actor Joan Hackett Dominique Laurant Actor John Gielgud Curt Valayan Actor Herbert Lom Matt Wilson Actor Eric Portman Notary Actor Peter van Eyck Walter Green Actor Oscar Homolka Inspector Ruff Actor Leon Greene The Big Man Actor William Conrad Executive Producer Jimmy Lydon Producer William Lava Original Music E.B. Clucher Cinematographer Harold Lipstein Cinematographer George R. Rohrs Film Editing John Beckman Art Director George James Hopkins Set Decoration