Ubaldo Ragona Director, Screenwriter Sidney Salkow Director Vincent Price Dr. Robert Morgan Actor Franca Bettoia Ruth Collins Actor Emma Danieli Virginia Morgan Actor Jack Stuart Ben Cortman Actor Antonio Corevi Governor Actor Umberto Raho Dr. Mercer Actor Christi Courtland Kathy Morgan Actor Alessandro Tedeschi Passerby Actor William F. Leicester Screenwriter Richard Matheson Screenwriter Furio M. Monetti Screenwriter Samuel Z. Arkoff Executive Producer Robert L. Lippert Producer Paul Sawtell Original Music Bert Shefter Original Music Franco Delli Colli Cinematographer Gene Ruggiero Film Editing Franca Silvi Film Editing Giorgio Giovannini Production Design Brunello Serena Ulloa Set Decoration