 Ryszard FilipskiMarcin Nowak / Nowak's Cellmate (voice) | Marcin Nowak / Nowak's Cellmate (voice) |
 Anna CiepielewskaTeresa | Teresa |
| HHenryk GiżyckiArtur Kenneth | Artur Kenneth |
 Andrzej KozakJan Duda "Garbus" | Jan Duda "Garbus" |
| WWacław UlewiczLeon Taszewski | Leon Taszewski |
| EEwa DrozdowskaMaja Ordężanka-Bogucka | Maja Ordężanka-Bogucka |
| SStanisław NiwińskiRalf Moes | Ralf Moes |
 Hanna BalińskaNot listed | Not listed |
| TTeresa KałudaRuta | Ruta |
 Małgorzata PotockaZuzanna | Zuzanna |
 Jerzy BińczyckiDoctor | Doctor |
 Jerzy Aleksander BraszkaPolish Intelligence Major | Polish Intelligence Major |
 Andrzej BuszewiczPolish Agent | Polish Agent |
 Andrzej GazdeczkaPGR Worker | PGR Worker |
 Juliusz GrabowskiRuta's "Father" | Ruta's "Father" |
 Andrzej JurczakTractor Driver | Tractor Driver |
 Jerzy KozakiewiczUB Officer in 1954 | UB Officer in 1954 |
 Tadeusz KwintaPGR Worker on a Train | PGR Worker on a Train |
 Bohdan MikućNot listed | Not listed |
 Jerzy MoesAgent kidnapping Duda | Agent kidnapping Duda |
 Janusz R. NowickiAgent | Agent |
 Stefan SzmidtCIA Agent | CIA Agent |
 Jerzy ZłotnickiKenneth's Agent | Kenneth's Agent |
 Zbigniew BielskiPolish Counter-Intelligence Officer (uncredited) | Polish Counter-Intelligence Officer (uncredited) |
 Jerzy FedorowiczAmerican Agent (uncredited) | American Agent (uncredited) |
 Stanisław JaroszyńskiAmerican Agent (uncredited) | American Agent (uncredited) |
 Eugeniusz KorczarowskiPolish Counter-Intelligence Officer (uncredited) | Polish Counter-Intelligence Officer (uncredited) |
| CCzesław Magnowski(uncredited) | (uncredited) |
 Zygmunt MalawskiMorozow (uncredited) | Morozow (uncredited) |
 Andrzej MrozekDoctor's Assistant (uncredited) | Doctor's Assistant (uncredited) |
