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