Trailer
Cast
Ralph Votrian
1st Gate Sergeant
Philip Abbott
Dr. Tom Merrinoe
Alexander Lockwood
Arthur Kelvaney
Gage Clarke
Dr. Bannerman
Marvin Miller
Robby the Robot (voice) (uncredited)
Robby the Robot
Robby
Richard Eyer
Timmie Merrinoe
Robert H. Harris
Prof. Frank Allerton
Helen Kleeb
Miss Vandergrift (uncredited)
Michael Miller
2nd Gate Sergeant
Diane Brewster
Mary Merrinoe
Harold J. Stone
Gen. Swayne
Than Wyenn
Prof. Zeller
Alvy Moore
Scientist (uncredited)
Gary Vinson
Young soldier (uncredited)
Rayford Barnes
Capt. McLaren (uncredited)