"An FBI agent goes to the French-Spanish border to round up some smugglers and counterfeiters after his brother is murdered."
Richard Greene
as Agente del Tesoro Lee Scott
Anouk Aimée
as Elena Vargas
Michael Denison
as Agente británico Ricky Metcalfe
José Nieto
as Pierre, secuaz principal
Alfonso Estela
as Secuaz
Philip Saville
as Martin Scott
Antonio Almorós
as Lucien Remue, secuaz
G.H. Mulcaster
as Coronel Ingleby
Conrado San Martín
Robert Ayres
as Sr. Dean, superior de la Embajada de los Estados Unidos
Richard Warner
as Inspector LeGrand, de la Surete
John Warwick
as Bryant, director del polideportivo
Arnold Bell
as Oficial de la cárcel
Olive Milbourne
as Mrs. Ingleby
Jesús Colomer
as (no acreditado)
José Ramón Giner
Ramón Martori
Rafael Albaicín
Max Brimmell
as Fotógrafo (no acreditado)
Alex Gallier
as Head Waiter (no acreditado)
Lloyd Lamble
as Funcionario de la Embajada (no acreditado)
Andreas Malandrinos
as Proprietario de la revista Gautier (no acreditado)
John Welsh
as Oficial superior de aduanas (no acreditado)
Christopher Lee
as Narrador (voz)
Julio Salvador
Director
Edwin Astley
Music
Lawrence Huntington
Writer
Harry Waxman
Director of Photography
Denis Johnson
Assistant Director
Tom Simpson
Editor
Betty Sherriff
Hairstylist
Ernest Gartside
Producer
Cedric Dawe
Art Direction
Graeme Hamilton
Sound Editor
Josep Maria Forn
Leonard Bulkley
Sound Recordist
George Burgess
Sound Director
Sydney Streeter
Production Manager
Connie Reeve
Makeup Artist