Aleksey Batalov
Dmitri Gusev
Innokentiy Smoktunovskiy
Ilya Kulikov
Tatyana Lavrova
Lyolya
Mikhail Kozakov
Valery Ivanovich
Nikolai Plotnikov
Professor Sintsov
Sergei Blinnikov
Butov
Evgeniy Evstigneev
Nikolai Ivanovich
Valentin Nikulin
young physicist
Pavel Shpringfeld
physicist
Lyusyena Ovchinnikova
Nura, Gusev's younger sister
Andrey Smirnov
tall bearded physicist
Yevgeni Teterin
Surgeon
Zinoviy Gerdt
Narrator (voice)
Viktor Lazarev
Guest at the wedding
