Robert Lewis Director Jackie Cooper Kurt Anderson Actor Monte Markham Eddie Reese, Col. Brice Randolph Actor Richard Anderson Dr. Wylie Actor Robert Lansing John Phillips Actor Susan Clark Gail Randolph Actor John Lupton Don Masters Actor Walter Brooke Tom Everett Actor James B. Sikking Astronaut Higgins Actor Paul Kent Carl Samuels Actor Loretta Leversee Toni Scott Actor Harve Bennett Producer Alric Edens Cinematographer Les Green Film Editing John Kaufman Film Editing George C. Webb Art Director Joseph Reith Set Decoration Charles Waldo Costume Design