Franco Nero as Carabinieri Colonel Dante Matucci

Anthony Quinn as Bruno Manzini

Martin Balsam as Captain Steffanelli

Claudia Cardinale as Elena Leporello

Sybil Danning as Lili Anders

Christopher Lee as Prince Baldasar, the Director of Counterintelligence

Cleavon Little as Major Carl Malinowski, USMC

Paul L. Smith as The Surgeon

John Steiner as Captain Roditi

Eli Wallach as General Leporello

Renzo Palmer as Carabinieri Major Giorgione

Anita Strindberg as Princess Faubiani

Marino Masé as Captain Rigoli

Jacques Herlin as Woodpecker

Fortunato Arena as General Pantaleone

John Stacy as Concierge

Andrea Esterhazy as Minister of Defense

Larry Dolgin as Captain Roditi (voice) (uncredited)

Tony Brandt as Gianni Bandanelli, Pantaleone's Lawyer (uncredited)

Omero Capanna as Hitman (uncredited)

Attilio Dottesio as Party Guest of Manzini's (uncredited)

Tom Felleghy as Man at Funeral (uncredited)

Alfonso Giganti as Man at Funeral (uncredited)

Margherita Horowitz as Wife of Minister of Defense (uncredited)

Gitte Lee as Princess Baldasar (uncredited)

Nello Pazzafini as Manzini's Bodyguard (uncredited)

Amedeo Salamon as Banquet Guest (uncredited)

Frank Nuyen as Man at Pantaleone's funeral (uncredited)