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)

Jimmy Charters

Martin Lyder