Ryszard Filipski
— Marcin Nowak / Nowak's Cellmate (voice)
Anna Ciepielewska
— Teresa
Henryk Giżycki
— Artur Kenneth
Andrzej Kozak
— Jan Duda "Garbus"
Wacław Ulewicz
— Leon Taszewski
Ewa Drozdowska
— Maja Ordężanka-Bogucka
Stanisław Niwiński
— Ralf Moes
Hanna Balińska
Teresa Kałuda
— Ruta
Małgorzata Potocka
— Zuzanna
Jerzy Bińczycki
— Doctor
Jerzy Aleksander Braszka
— Polish Intelligence Major
Andrzej Buszewicz
— Polish Agent
Andrzej Gazdeczka
— PGR Worker
Juliusz Grabowski
— Ruta's "Father"
Andrzej Jurczak
— Tractor Driver
Jerzy Kozakiewicz
— UB Officer in 1954
Tadeusz Kwinta
— PGR Worker on a Train
Bohdan Mikuć
Jerzy Moes
— Agent kidnapping Duda
Janusz R. Nowicki
— Agent
Stefan Szmidt
— CIA Agent
Jerzy Złotnicki
— Kenneth's Agent
Zbigniew Bielski
— Polish Counter-Intelligence Officer (uncredited)
Jerzy Fedorowicz
— American Agent (uncredited)
Stanisław Jaroszyński
— American Agent (uncredited)
Eugeniusz Korczarowski
— Polish Counter-Intelligence Officer (uncredited)
Czesław Magnowski
— (uncredited)
Zygmunt Malawski
— Morozow (uncredited)
Andrzej Mrozek
— Doctor's Assistant (uncredited)