• 
  Dee Wallace

  May
• 
  Pat Morita

  Maurice
• 
  Fay Hauser

  Nina
• 
  Ruth Gordon

  Bernice
• 
  Paul Le Mat

  John
• 
  James Donald

  Harry Walker
• 
  Ed Call

  1st Agent
• 
  Don Adams (I)

  Harry Walker

• 
  Steven Chambers

  2nd Trooper
• 
  Gary Coleman

  Jimmy
• 
  Avery Schreiber

  Dr. Stevens

• 
  John Cameron

  departament sunet
• 
  Richard C. Meyer

  montaj
• 
  Jerry P. Jacobs

  miscellaneous crew
• 
  Lawrence Kuppin

  producător

• 
  Joe Digaetano

  special effects
• 
  Donald E. Westlake

  scriitor