"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
Irving Ravetch
Screenplay
Cesare Gambarelli
Makeup Artist
Larry Germain
Hairstylist
Sheryl Deauville
Assistant Costume Designer
Harriet Frank Jr.
Giuseppe Banchelli
Vasco Reggiani
Ferdinando Ruffo
Set Decoration
John McCarthy Jr.
Aurelio Crugnola
Art Direction
Cesare Allione
Camera Operator
John Merrick
Casting
Alberto Pizzi
Cinematography
Giorgio Sciommer
Stanley Ellin
Novel
Paola Roli
Piero Portalupi
Bud Westmore
J. Terry Williams
Editor
Frank Arrigo
Kurt Doubrowsky
Sound
Waldon O. Watson
Richard Berg
Producer
Alexander Golitzen
Edith Head
Costume Design