 Jan KanyzaKarel Vojta | Karel Vojta |
 Valentina ShendrikovaDr. Margarita Aleksandrovna | Dr. Margarita Aleksandrovna |
 Boris ShcherbakovArkadiy Voyvodin | Arkadiy Voyvodin |
 Anatoliy SolonitsynLev Nikolayevich Slivin | Lev Nikolayevich Slivin |
| VViktor GogolevAleksandr Aleksandrovich Borisov | Aleksandr Aleksandrovich Borisov |
 Evgeniy Leonov-GladyshevMisha | Misha |
 Vladimír RážJosef Vendler | Josef Vendler |
 Vítězslav JandákSláveček Žlabíček | Sláveček Žlabíček |
 Jan PohanŠembera | Šembera |
| JJan KrafkaLukeš | Lukeš |
 Viktor IlichyovViktor | Viktor |
| TTomáš SedláčekYoung Designer | Young Designer |
 Jiří LírEngineer | Engineer |
 Miloslav HomolaEngineer | Engineer |
| ŽŽofie VeseláNurse | Nurse |
 Hana ČížkováBlonde | Blonde |
 Jitka ZelenohorskáShop Assistant | Shop Assistant |
| OOlga BlechováShop Assistant | Shop Assistant |
 Jarmila SmejkalováKarel's Mother | Karel's Mother |
 Nina RuslanovaCoordinator | Coordinator |
 Bohumil ŠvarcChief Engineer | Chief Engineer |
| DDušan KuricDriver | Driver |
| MMilan PěknýDriver | Driver |
| ĽĽudovít SlešDriver | Driver |
 Pavel KashlakovInspector | Inspector |
 Jorga KotrbováDr. Margarita Aleksandrovna (voice) | Dr. Margarita Aleksandrovna (voice) |
 Miroslav MoravecArkadiy Voyvodin (voice) | Arkadiy Voyvodin (voice) |
| FFrantišek VicenaLev Nikolayevich Slivin (voice) | Lev Nikolayevich Slivin (voice) |
 Otakar BrousekAleksandr Aleksandrovich Borisov (voice) | Aleksandr Aleksandrovich Borisov (voice) |
| JJiří NovotnýMisha (voice) | Misha (voice) |