Francis D. Lyon Director Scott Brady Cmdr. Wayne Actor Sheree North Dr. Rene Peron Actor Gary Merrill Dr. LaSatier Actor Wende Wagner Sandra Welles Actor Mike Road Hugh Maddox Actor John Howard Dr. James Actor William Thourlby Tex Actor Biff Elliot Dr. Wilson Actor Arthur C. Pierce Screenwriter Earle Lyon Producer Fred Jordan Executive Producer Brick Marquard Cinematographer Robert S. Eisen Film Editing Paul Dunlap Original Music Paul Sylos Art Director Harry Reif Set Decoration Kerwin Coughlin Casting Jasper Russel Casting