After an unauthorized letter suggesting U.S. support for a Russian attack on China is sent to Moscow, a former naval officer and his team go undercover to retrieve it. Their plans are disrupted when a cunning politician raids their hideout.
| Actor | Role |
|---|---|
 Bibi AnderssonErika Kosnov | Erika Kosnov |
 Patrick O'NealCharles Rone | Charles Rone |
 Richard BooneWard | Ward |
 Nigel GreenThe Whore | The Whore |
 Dean JaggerHighwayman | Highwayman |
 Lila KedrovaMadam Sophie | Madam Sophie |
 Micheál Mac LiammóirSweet Alice | Sweet Alice |
 Barbara ParkinsB. A. | B. A. |
 Ronald RaddCaptain Potkin | Captain Potkin |
 George SandersWarlock | Warlock |
 Raf VallonePuppet Maker | Puppet Maker |
 Max von SydowColonel Kosnov | Colonel Kosnov |
 Orson WellesBresnavitch | Bresnavitch |
 Sandor ElèsLt. Grodin | Lt. Grodin |
 Niall MacGinnisErector Set | Erector Set |
 Anthony ChinnKitai | Kitai |
 Guy DeghyProfessor | Professor |
 John HustonAdmiral | Admiral |
| FFulvia KetoffSonia Potkin | Sonia Potkin |
 Vonetta McGeeThe Negress | The Negress |
 Marc LawrenceThe Priest | The Priest |
 Cyril ShapsPolice Doctor | Police Doctor |
 Christopher SandfordRudolph | Rudolph |
| HHana Maria PravdaMrs. Kazar | Mrs. Kazar |
 George PravdaKazar | Kazar |
 Ludmilla DudarovaMrs. Potkin | Mrs. Potkin |
| DDimitri TamarovIlya | Ilya |
 Pehr-Olof SirénReceptionist | Receptionist |
| DDaniel SmidWaiter | Waiter |
| VVictor BeaumontThe Dentist | The Dentist |