 Piotr GarlickiFeliks | Feliks |
 Grigori AbrikosovAzef | Azef |
 Barbara BargiełowskaRóza Luksemburg | Róza Luksemburg |
 Donatas BanionisHarting | Harting |
 Oleg BasilashviliKiryl Prokopiewicz Nikolajew (as Oleg Basilaszwili) | Kiryl Prokopiewicz Nikolajew (as Oleg Basilaszwili) |
 Agata RzeszewskaJulia (as Agata Keschenska) | Julia (as Agata Keschenska) |
 Eve KiviAldona | Aldona |
 Janusz KłosińskiZbigniew Norowski | Zbigniew Norowski |
 Danuta KowalskaHelena Górowska | Helena Górowska |
 Marian ŁąckiJulian Marchlewski | Julian Marchlewski |
 Jerzy MatałowskiWlodzimierz Notten | Wlodzimierz Notten |
 Yuri MedvedevJohn Scott (as Jurij Miedwiediew) | John Scott (as Jurij Miedwiediew) |
 Valentin NikulinKarbowski (as Walentin Mikulin) | Karbowski (as Walentin Mikulin) |
 Andrey MironovGlasov (as Andriej Mironow) | Glasov (as Andriej Mironow) |
 Yuriy NazarovProchorow (as Jurij Nazarow) | Prochorow (as Jurij Nazarow) |
 Marek NowakowskiWincenty | Wincenty |
 Pavel PankovSzewiakow (as Pawel Pankow) | Szewiakow (as Pawel Pankow) |
 Andrzej WasilewiczMaciej Grybas | Maciej Grybas |
| KKrystyna Maciejewska-ZapasiewiczWorker Wanda (as Krystyna Zapasiewicz) | Worker Wanda (as Krystyna Zapasiewicz) |
| JJerzy CnotaComrade (uncredited) | Comrade (uncredited) |
 Mieczysław JanowskiComrade (uncredited) | Comrade (uncredited) |
