Dirk Bogarde
Frank Clemmons
Alexis Smith
Glenda Esmond
Alexander Knox
Dr. Clive Esmond
Hugh Griffith
Inspector Simmons
Patricia McCarron
Sally Foster, maid
Maxine Audley
Carol
Glyn Houston
Bailey
Harry Towb
Harry, second criminal
Russell Waters
Manager of Pearce & Mann
Billie Whitelaw
Receptionist at Pearce & Mann
Fred Griffiths
Taxi Driver
Esma Cannon
Scrubwoman with ladder
Ross Parker
Barman (uncredited)