Cesar Romero
Philip 'Phil' O'Dell
Acting
Bernadette O'Farrell
Heather McMara
Acting
Lois Maxwell
Margaret 'Peggy' Maybrick
Acting
Geoffrey Keen
Christopher Hampden
Acting
Campbell Singer
Inspector Rigby
Acting
Alastair Hunter
Det. Sgt. Reilly
Acting
Mary Mackenzie
Marilyn Durant
Acting
Lloyd Lamble
Martin Sorrowby
Acting
Frank Birch
Boswell - Airport Manager
Acting
Wensley Pithey
Sid - Bartender
Acting
Reed De Rouen
Connors
Acting
Peter Swanwick
Smithers
Acting
Richard Johnson
Danny McMara - Hit-and-Run Victim
Acting
Bill Fraser
Sales Manager
Acting
Lisa Lee
Donna Devore
Acting
Lionel Harris
Allan Mellon
Directing
Betty Cooper
Dr. Campbell - Asylum Superintendent
Acting
Clare James
Miss Andrews - Asylum Receptionist
Acting
Katie Johnson
Mad Mary - Old Inmate at Murder Scene
Acting
Jacques Cey
Head Waiter
Acting
Jean Bayless
Delmont Switchboard Operator (as Jean Bayliss)
Acting
Stuart Nichol
Steve
Acting
Marguerite Brennan
Desk Clerk at Heather's Apartment
Acting
Robert Adair
John - Film Director
Acting
Terry Carney
Minor Role (uncredited)
Acting
Robert Dorning
Airline Reservations Clerk (uncredited)
Acting
Josephine Douglas
Nurse at Glenhaven Sanatorium (uncredited)
Production
Christina Forrest
Minor Role (uncredited)
Acting
Jack Howarth
Minor Role (uncredited)
Acting
Robert Moore
Minor Role (uncredited)
Acting
Stuart Saunders
Police Sergeant (uncredited)
Acting
Dorinda Stevens
Girl at Film Studio (uncredited)
Acting
Hazel Sutton
Minor Role (uncredited)
Acting
Larry Taylor
Hospital Attendant (uncredited)
Acting
James Ure
Airline Reservations Clerk (uncredited)
Acting