"In 1960s Paris, an American boxer stumbles upon an international fascist conspiracy that aims to create a new world order."
George Peppard
as Reno Davis
Inger Stevens
as Anne de Villemont
Orson Welles
as Leschenhaut
Perrette Pradier
as Jeanne-Marie
Keith Michell
as Morillon
Geneviève Cluny
as Veronique
Maxine Audley
as Mathilde Rosier
Ralph Michael
as Claude de Gonde
Barnaby Shaw
as Paul
Jacques Roux
as Maguy
Patience Collier
as Goonelle
William Job
as Bourdon
Ave Ninchi
as Signora Orragi
Renzo Palmer
as Monk
Peter Bayliss
as Edmond Rosier
Francesco Mulè
as Policeman at Trevi Fountain
Rosemary Dexter
as Daniela
Raoul Delfosse
as Louis Le Buc
James Mishler
as Jesse Hardee
Jean Louis
as Driot
Jean Hébey
as Man in charge of sleeping cars
Jacques Stany
as Georges - the family chauffeur
Paule Albert
as Sophie
Calisto Calisti
as Police Inspector at Rome Station (uncredited)
Andrea Esterhazy
as de Villemont Party Guest (uncredited)
John Guillermin
Director
Francis Lai
Original Music Composer
Sheryl Deauville
Assistant Costume Designer
Stanley Ellin
Novel
Harriet Frank Jr.
Screenplay
Irving Ravetch
Richard Berg
Producer
Piero Portalupi
Cinematography
Alberto Pizzi
J. Terry Williams
Editor
Paola Roli
Casting
Frank Arrigo
Art Direction
Aurelio Crugnola
Alexander Golitzen
John McCarthy Jr.
Set Decoration
Ferdinando Ruffo
Kurt Doubrowsky
Sound
Waldon O. Watson
Cesare Allione
Camera Operator
John Merrick
Giuseppe Banchelli
Makeup Artist
Cesare Gambarelli
Larry Germain
Hairstylist
Vasco Reggiani
Giorgio Sciommer
Bud Westmore
Edith Head
Costume Design