• 
  Bob Clark

  regizor

• 
  Roy Moore

  scenarist

• 
  Olivia Hussey

  Jessica Bradford
• 
  Margot Kidder

  Barbie Coard
• 
  Andrea Martin

  Phyllis Carlson
• 
  Lynne Griffin

  Clare Harrison
• 
  Keir Dullea

  Peter Smythe
• 
  Marian Waldman

  Mac

• 
  John 'Frenchie' Berger
• 
  Les Rubie

  Search Party
• 
  Bob Clark

  Prowler Shadow/Phone Voice
• 
  Robert Warner

  Doctor
• 
  Marcia Diamond

  Woman
• 
  Nick Mancuso

  The Prowler/Phone Voice
• 
  Leslie Carlson

  Bill Graham

• 
  John Saxon

  Lieutenant Kenneth Fuller
• 
  Martha Gibson

  Mrs. Quaife
• 
  Art Hindle

  Chris Hayden
• 
  James Edmond

  Mr. Harrison
• 
  Doug McGrath

  Sargeant Nash (as Douglas McGrath)
• 
  Michael Rapport

  Patrick
• 
  John Rutter

  Laughing Detective