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Josef Vinklář as Antonín Homolka |
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Stanislav Fišer as Ctirad |
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Zdeněk Braunschläger as Vojta |
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Rudolf Deyl as Stein |
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Rudolf Hrušínský as locksmith Alois Pohanka |
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Miloš Kopecký as Melichar Hnátek |
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Robert Vrchota as Ludvík Mikola |
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Josef Kemr as paleontolog Frantisek Jezek |
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Eva Kubešová as Ivanka Bartáková |
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Stella Zázvorková as Kveta Vejdovoda |
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Marie Kyselková as Anicka Safránková |
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Otto Lackovič as Rudolf Pecián |
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Radovan Lukavský as Engineer |
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Jaroslav Mareš as Chauffeur |
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Bohuš Záhorský as Renner |
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Václav Voska as Terský |
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Stanislav Neumann as guard of grandfather Jonas |
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Miloš Vavruška as Lieutenant Plotek |
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Oldřich Vykypěl as gamekeeper Petr Jiřička |
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Jiřina Steimarová as Jiřičková |
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Lubomír Lipský as Elder of the Border Guard |
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L. H. Struna as miner |
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Miroslav Svoboda as miner |
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Josef Chvalina as chief geologist |
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Jiří Smutný as geologist |
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Karel Kocourek as |
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Vladimír Linka as |
| Costume & Make-Up | Vladimír Petřina | Makeup & Hair |
| Production | Josef Pitrák | Unit Production Manager |
| Directing | Vladimír Zelenka | Assistant Director |
| Camera | Miroslav Sinkule | Assistant Camera |
| Directing | Helena Pokorná | Assistant Director |
| Costume & Make-Up | Marie Malá | Costumer |
| Costume & Make-Up | Anna Kuchačevičová | Costumer |
| Sound | František Belfín | Conductor |
| Writing | Jiří Sequens | Screenplay |
| Art | Karel Lier | Production Design |
| Art | Antonín Pašek | Set Decoration |
| Production | Jiří Pokorný | Production Manager |
| Camera | Vladimír Řezníček | Assistant Camera |
| Writing | Miloš Velínský | Story |
| Writing | Josef Kainar | Lyricist |
| Writing | Miloš Velínský | Screenplay |
| Sound | Dobroslav Šrámek | Sound |
| Directing | Jiří Sequens | Director |
| Editing | Jan Chaloupek | Editor |
| Sound | Miloš Vacek | Original Music Composer |
| Camera | Rudolf Milič | Director of Photography |
