 Jan PeszekProf. Rappaport / S. Lem (voice) | Prof. Rappaport / S. Lem (voice) |
 Michał CzerneckiGerman Officer | German Officer |
| MMagdalena ŻakowskaRachela | Rachela |
| MMaciej KuligJew | Jew |
 Dominika KachlikBarbara | Barbara |
 Aleksandar MilićevićHussarski | Hussarski |
 Masza WągrockaHalina | Halina |
| HHubert PaszkiewiczJan | Jan |
| JJakub HojdaAleksander | Aleksander |
 Borys LankoszDirector Bob | Director Bob |
 Mirosław ZbrojewiczGeneral | General |
 Zbigniew KonopkaMorris | Morris |
 Robert GoneraKing Zbawnucy | King Zbawnucy |
 Krzysztof SzczepaniakOdmrożeniec | Odmrożeniec |
| TTomasz OlejnikKapellmeister | Kapellmeister |
 Filip KosiorDouble Bassist | Double Bassist |
 Olga KalickaCymbalist | Cymbalist |
| KKarolina SulejViolinist | Violinist |
| MMateusz KubikTrumpeter | Trumpeter |
| SStanisław BereśSelf - Literary Historian | Self - Literary Historian |
| TTomasz FiałkowskiSelf - Journalist | Self - Journalist |
| JJerzy JarzębskiSelf - Literary Critic | Self - Literary Critic |
| WWiktor JazniewiczSelf - Lem's Russian Translator | Self - Lem's Russian Translator |
| MMichael KandelSelf - Lem's English Translator | Self - Lem's English Translator |
| MMichał ZychSelf - B. Lem's Nephew | Self - B. Lem's Nephew |
 Marek KondratSelf - Narrator (voice) (uncredited) | Self - Narrator (voice) (uncredited) |
 Stanisław LemSelf - Writer (archive footage) | Self - Writer (archive footage) |
 Timothy SnyderSelf - Historian | Self - Historian |
