 | Franco Nero als Carabinieri Colonel Dante Matucci |
 | Anthony Quinn als Bruno Manzini |
 | Martin Balsam als Captain Steffanelli |
 | Claudia Cardinale als Elena Leporello |
 | Sybil Danning als Lili Anders |
 | Christopher Lee als Prince Baldasar, the Director of Counterintelligence |
 | Cleavon Little als Major Carl Malinowski, USMC |
 | Paul L. Smith als The Surgeon |
 | John Steiner als Captain Roditi |
 | Eli Wallach als General Leporello |
 | Renzo Palmer als Carabinieri Major Giorgione |
 | Anita Strindberg als Princess Faubiani |
 | Marino Masé als Captain Rigoli |
 | Jacques Herlin als Woodpecker |
 | Fortunato Arena als General Pantaleone |
 | John Stacy als Concierge |
 | Andrea Esterhazy als Minister of Defense |
| Larry Dolgin als Captain Roditi (voice) (uncredited) |
| Tony Brandt als Gianni Bandanelli, Pantaleone's Lawyer (uncredited) |
 | Omero Capanna als Hitman (uncredited) |
 | Attilio Dottesio als Party Guest of Manzini's (uncredited) |
 | Tom Felleghy als Man at Funeral (uncredited) |
 | Alfonso Giganti als Man at Funeral (uncredited) |
 | Margherita Horowitz als Wife of Minister of Defense (uncredited) |
| Gitte Lee als Princess Baldasar (uncredited) |
 | Nello Pazzafini als Manzini's Bodyguard (uncredited) |
 | Amedeo Salamon als Banquet Guest (uncredited) |
 | Frank Nuyen als Man at Pantaleone's funeral (uncredited) |
| Peter Zinner | Director |
| Robert Katz | Writer |
| Rod Serling | Adaptation |
| Morris L. West | Novel |
| Erwin C. Dietrich | Producer |
| William R. Forman | Executive Producer |
| Paul Maslansky | Producer |
| Marcello Gatti | Director of Photography |
| Claudio M. Cutry | Editor |
| Katina Zinner | Editor |
| Renzo Rossellini | Co-Producer |
| Jerry Goldsmith | Original Music Composer |
| Robert Katz | Screenplay |
| Tony Brandt | Assistant Director |
| Patrizia Ceresani | Assistant Editor |
| Giantito Burchiellaro | Art Direction |
| Fabrizio Caracciolo | Costume Design |
| Joe Pollini | Production Manager |
| Fernando Valento | Construction Manager |
| Tonino Testa | Sound |
| Angelo Ragusa | Stunts |
| Stefano Marino | Electrician |
| Wayne Fitzgerald | Title Designer |
