• 
  Herman Hoffman

  regizor

• 
  Harold J. Stone

  Gen. Swayne
• 
  Diane Brewster

  Mary Merrinoe
• 
  Helen Kleeb

  Miss Vandergrift
• 
  Alexander Lockwood

  Arthur Kelvaney
• 
  Gage Clarke

  Dr. Bannerman
• 
  Richard Eyer

  Timmie Merrinoe
• 
  Alvy Moore

  Scientist #4 (pranks scene)

• 
  Philip Abbott

  Dr. Tom Merrinoe
• 
  Robert H. Harris

  Prof. Frank Allerton
• 
  Alfred Linder

  Martin / Computer
• 
  Dennis McCarthy

  Col. Macklin
• 
  Michael Miller

  2nd Gate Sergeant
• 
  John O'Malley

  Prof. Baine
• 
  Jefferson Searles

  Prof. Foster (as Jefferson Dudley Searles)

• 
  Ralph Votrian

  1st Gate Sergeant
• 
  Than Wyenn

  Prof. Zeller
• 
  Robby the Robot

  Robby

• 
  Merrill Pye

  art director
• 
  Lynn Stalmaster

  casting department
• 
  Les Baxter

  departament sunet
• 
  Les Baxter

  music department
• 
  Nicholas Nayfack

  producător
• 
  Darrell Silvera

  set decorator
• 
  Cyril Hume

  scriitor