Jack Palance
— Milo March
Anita Ekberg
— Trudie Hall
Nigel Patrick
— Sam Carter
Anthony Newley
— Ernesto
Bonar Colleano
— Martin Lomer
Sean Kelly
— Rizzio
Sidney James
— Franklin
Donald Pleasence
— Organ Grinder
Eric Pohlmann
— Tristao
Josephine Brown
— Mrs. Frazur
Gerard Heinz
— Stone
Alec Mango
— Lopez
Anne Aubrey
— Girl on Train
Mary Laura Wood
— Mrs. Pritchard
Angela White
— Pamela Pritchard
Alfred Burke
— Mr. Pritchard
Bill Shine
— English Husband
Joan Ingram
— English Wife
Naomi Chance
— Jane Leighton
Mark Baker
— Mullins
Alex Gallier
— Hotel Manager Lisbon
Walter Gotell
— Profuno
Richard Golding
— Bar Head Waiter
Maxwell Shaw
— Desk Clerk Lisbon
Raymond Adamson
— Police Inspector (uncredited)
Paul Beradi
— Bystander at Wrecked Car (uncredited)
Ernest Blyth
— Man in Lisbon Hotel (uncredited)
Jack Cunningham
— Stone's Jailer (uncredited)
Victor Harrington
— Man in Madrid Hotel (uncredited)
Anthony John
— Child (uncredited)