Philip 'Phil' O'Dell

Cesar Romero

Heather McMara

Bernadette O'Farrell

Margaret 'Peggy' Maybrick

Lois Maxwell

Christopher Hampden

Geoffrey Keen

Inspector Rigby

Campbell Singer

Det. Sgt. Reilly

Alastair Hunter

Marilyn Durant

Mary MacKenzie

Marilyn Durant

Mary Mackenzie

Martin Sorrowby

Lloyd Lamble

Sid - Bartender

Wensley Pithey

Connors

Reed De Rouen

Smithers

Peter Swanwick

Danny McMara - Hit-and-Run Victim

Richard Johnson

Sales Manager

Bill Fraser

Donna Devore

Lisa Lee

Allan Mellon

Lionel Harris

Dr. Campbell - Asylum Superintendent

Betty Cooper

Mad Mary - Old Inmate at Murder Scene

Katie Johnson

Head Waiter

Jacques Cey

Steve

Stuart Nichol

Desk Clerk at Heather's Apartment

Marguerite Brennan

John - Film Director

Robert Adair

Airline Reservations Clerk (uncredited)

Robert Dorning

Nurse at Glenhaven Sanatorium (uncredited)

Josephine Douglas

Minor Role (uncredited)

Jack Howarth

Police Sergeant (uncredited)

Stuart Saunders

Girl at Film Studio (uncredited)

Dorinda Stevens

Minor Role (uncredited)

Hazel Sutton

Hospital Attendant (uncredited)

Larry Taylor