"An American businessman visiting Lisbon gets mistaken for a British secret agent who stole some diamonds. As a result, he has everybody in Lisbon after him."
James Garner
as William Beddoes
Melina Mercouri
as Aurora / Celeste da Costa
Sandra Dee
as Amy Franklin
Anthony Franciosa
as Steve / Antonio
Robert Coote
as Hatton / Jones
Roland Culver
as Doctor Mathieson
Grégoire Aslan
as Florian
Cecil Parker
as Sir Huntley Frazier
Dulcie Gray
as Mrs. Mathieson
Martin Benson
as Politanu
Peter Illing
as Zarik
Niall MacGinnis
as Ship's Captain
Virgílio Teixeira
as Inspector Rodrigues
Ronald Neame
Director
Cliff Owen
Richard L. Breen
Screenplay
T. E. B. Clarke
David E. Walker
Novel
Alma Macrorie
Editor
Robert Arthur
Producer
Executive Producer
Ernest B. Wehmeyer
Associate Producer
Bert Kaempfert
Original Music Composer
John DeCuir
Art Direction
Tom Hale
Giuseppe Chevalier
Set Decoration
Gilbert Kurland
Unit Production Manager
Edward Muhl
Executive In Charge Of Production
William Russell
Sound
Waldon O. Watson
John Daheim
Stunts
Roberto Fizz
Assistant Director
Mauro Sacripanti
Douglas Green
Joseph Gershenson
Music Supervisor
Dimis Kritsas
Wardrobe Coordinator
Jean Louis
Gábor Pogány
Director of Photography