Dirk Bogarde

as Frank Clemmons

Alexis Smith

as Glenda Esmond

Alexander Knox

as Dr. Clive Esmond

Hugh Griffith

as Inspector Simmons

Patricia McCarron

as Sally Foster, maid

Maxine Audley

as Carol

Glyn Houston

as Bailey

Harry Towb

as Harry, second criminal

Russell Waters

as Manager of Pearce & Mann

Billie Whitelaw

as Receptionist at Pearce & Mann

Fred Griffiths

as Taxi Driver

Esma Cannon

as Scrubwoman with ladder

Ross Parker

as Barman (uncredited)

Jimmy Charters

Martin Lyder

John Lynn

Jim Tyson

Harry Van Engel