Cesar Romero

Character: Philip 'Phil' O'Dell

Bernadette O'Farrell

Character: Heather McMara

Lois Maxwell

Character: Margaret 'Peggy' Maybrick

Geoffrey Keen

Character: Christopher Hampden

Campbell Singer

Character: Inspector Rigby

Alastair Hunter

Character: Det. Sgt. Reilly

Mary Mackenzie

Character: Marilyn Durant

Lloyd Lamble

Character: Martin Sorrowby

Frank Birch

Character: Boswell - Airport Manager

Wensley Pithey

Character: Sid - Bartender

Reed De Rouen

Character: Connors

Peter Swanwick

Character: Smithers

Richard Johnson

Character: Danny McMara - Hit-and-Run Victim

Bill Fraser

Character: Sales Manager

Lisa Lee

Character: Donna Devore

Lionel Harris

Character: Allan Mellon

Betty Cooper

Character: Dr. Campbell - Asylum Superintendent

Clare James

Character: Miss Andrews - Asylum Receptionist

Katie Johnson

Character: Mad Mary - Old Inmate at Murder Scene

Jacques Cey

Character: Head Waiter

Jean Bayless

Character: Delmont Switchboard Operator (as Jean Bayliss)

Stuart Nichol

Character: Steve

Marguerite Brennan

Character: Desk Clerk at Heather's Apartment

Robert Adair

Character: John - Film Director

Terry Carney

Character: Minor Role (uncredited)

Robert Dorning

Character: Airline Reservations Clerk (uncredited)

Josephine Douglas

Character: Nurse at Glenhaven Sanatorium (uncredited)

Christina Forrest

Character: Minor Role (uncredited)

Jack Howarth

Character: Minor Role (uncredited)

Robert Moore

Character: Minor Role (uncredited)

Stuart Saunders

Character: Police Sergeant (uncredited)

Dorinda Stevens

Character: Girl at Film Studio (uncredited)

Hazel Sutton

Character: Minor Role (uncredited)

Larry Taylor

Character: Hospital Attendant (uncredited)

James Ure

Character: Airline Reservations Clerk (uncredited)