• 
  William Shatner

  Lt. Col. Josef Gronke
• 
  Richard Basehart

  Brig. Gen. Russell Hamner
• 
  Vince Edwards

  Maj. Michael Devlin
• 
  Noah Keen

  Maj. Gen. Schurm
• 
  Lawrence P. Casey

  Gant
• 
  Bart Burns

  Older Senator
• 
  Julie Bennett

  Amanda
• 
  Lou Antonio

  Tony

• 
  Vince Edwards

  Maj. Michael Devlin
• 
  Patrick Wayne

  Mac
• 
  Ian Abercrombie

  British co-pilot
• 
  Alan Caillou

  Corey

• 
  William Craig Smith

  art director
• 
  James Crabe

  imagine
• 
  James Aubrey

  imagine

• 
  Morton Stevens

  music department
• 
  Steve Shagan

  producător
• 
  Bud Alper

  sound department