Double Negative

Michael Sarrazin

Michael Taylor

Susan Clark

Paula West

Anthony Perkins

Lawrence Miles

Howard Duff

Lester Harlen

Kate Reid

Mrs. Swanscutt

Al Waxman

Dellassandro

Elizabeth Shepherd

Frances

Kenneth Welsh

Dr. Klifter

Ken James

City Editor

Lee Broker

Bartender

John Candy

John

Douglas Campbell

The Walker

Maury Chaykin

Rollins

John Friesen

Trucker

Joe Flaherty

Roger

David Gardner

Cunningham

Ron Hartmann

Howell

Michael Ironside

Edgar

Eugene Levy

Matt

Kate Lynch

Stewardess

Sabina Maydelle

Penelope

Bob McHeady

Electrician

Heather McKay

Squash Pro

Catherine O'Hara

Judith

Pita Oliver

Lorraine

Vivian Rakoff

Dr. Wright

Dave Thomas

Howie

Bob Warner

Detective

Charles Dennis

Reporter in Newspaper Office (uncredited)

Tommy King

Hockey Kid

Robert McCart

Assistant Director

George Bloomfield

Director

Janis Allen

Dialogue

Ross Macdonald

Novel

Thomas Hedley Jr.

Adaptation

Charles Dennis

Writer

Thomas Hedley Jr.

Writer

Janis Allen

Associate Producer

Joyce Kozy King

Production Manager

René Verzier

Director of Photography

Mary Kerr

Art Direction

George Appleby

Editor