- Aleksandr Alekseev
- Sergei Maslyukov, KGB lieutenant
- Natalya Dmitriyeva
- Valentina
- Klavdiya Fadeyeva
- Annushka, nurse
- Vitaliy Gordienko
- Pahomov, seaman
- Igor Ivanov
- Fedya, chekist
- Nikolay Karamyshev
- professor Zavyaov's old friend
- Valeriya Kiselyova
- Olga, apothecary
- Yuri Lazarev
- Konstantin Potapych Karatygin, KGB major
- Mikhail Matveev
- Vasiliy Alekseevich Trifonov
- Yuriy Olennikov
- Stepan Panfilov, Misha's friend
