Olivia Hussey

Jess

Keir Dullea

Peter

Margot Kidder

Barb

John Saxon

Lt. Fuller

Marian Waldman

Mrs. Mac

Andrea Martin

Phyl

Doug McGrath

Sargeant Nash

Art Hindle

Chris

Lynne Griffin

Clare

Leslie Carlson

Graham

Martha Gibson

Mrs. Quaife

John Stoneham Sr.

Cop

Bob Clark

Prowler Shadow / Phone Voice (uncredited)

Nick Mancuso

The Prowler / Phone Voice (uncredited)

Ann Sweeny

Phone Voice (voice) (uncredited)