Nikolai Simonov
- Major Maleev
- (as N. Simonov)
Yuriy Tolubeev
- Wintering Commandant
- (as Yu. Tolubeyev)
Nina Mazaeva
- Asya Moskalyova
- (as N. Mazaeva)
Vladimir Volchik
- Aleksey Tkachenko
- (as V. Volchik)
Anatoliy Kuznetsov
- Chief of Staff
- (as A. Kuznetsov)
Sergey Filippov
- Timokhin
- (as S. Filippov)
Vladimir Maryev
- Sudarev
- (as V. Marev)
Stepan Krylov
- First Mate
- (as S. Krylov)
Nikolai Stepanov
- 'Granddad' - Radio Operator
- (as N. Stepanov)
Anatoliy Alekseev
- Chief Mate BO
- (as A. Alekseev)
Oleg Zhakov
- German
- (uncredited)