Kenneth G. Crane Director, Film Editing Jim Davis Dr. Quent Brady Actor Robert Griffin Dan Morgan Actor Joel Fluellen Arobi Actor Barbara Turner Lorna Lorentz Actor Eduardo Ciannelli Mahri Actor Vladimir Sokoloff Dr. Lorentz Actor Tim Huntley Territorial Agent (uncredited) Actor LaVerne Jones Kuana (uncredited) Actor Frederic Potler Radar Operator (uncredited) Actor Louis Vittes Screenwriter Endre Bohem Screenwriter Al Zimbalist Producer Jack J. Gross Executive Producer Philip N. Krasne Executive Producer Ray Flin Cinematographer Albert Glasser Original Music Ernst Fegté Production Design G.W. Berntsen Set Designer