Jan Kanyza

Karel Vojta

Valentina Shendrikova

Dr. Margarita Aleksandrovna

Boris Shcherbakov

Arkadiy Voyvodin

Anatoliy Solonitsyn

Lev Nikolayevich Slivin

Viktor Gogolev

Aleksandr Aleksandrovich Borisov

Evgeniy Leonov-Gladyshev

Misha

Vladimír Ráž

Josef Vendler

Vítězslav Jandák

Sláveček Žlabíček

Jan Pohan

Šembera

Viktor Ilichyov

Viktor

Jiří Lír

Engineer

Miloslav Homola

Engineer

Hana Čížková

Blonde

Jitka Zelenohorská

Shop Assistant

Jarmila Smejkalová

Karel's Mother

Nina Ruslanova

Coordinator

Bohumil Švarc

Chief Engineer

Jorga Kotrbová

Dr. Margarita Aleksandrovna (voice)

Miroslav Moravec

Arkadiy Voyvodin (voice)

Otakar Brousek

Aleksandr Aleksandrovich Borisov (voice)