Georgiy Silantev (as A. Abrikosov)
Ivan Zotov (as V. Kenigson)
Sergey Korshunov (as V. Safonov)
A. N. Volokhov (as A. Gribov)
Lobanov (as Ye. Matveyev)
Garanin (as A. Myagkikh)
Lena (as N. Fateyeva)
Valya Amosova (as T. Loginova)
Katya Svetlova (as M. Kazakova)
Mitya Neverov (as E. Bredun)
Igor Peresvetov (as O. Tabakov)
Churkin (as Yu. Prokopovich)
Innokentiy Grigorev (as V. Yemelyanov)
'neznakomets' (as I. Pereverzev)
Safron Lozhkin (as M. Pugovkin)
Yakov Kuptsevich (as A. Gumburg)
Arnold (as V. Kulik)
Rastyagayev (as L. Polyakov)
Kamov (as A. Ivanov)
Zoyka Lozhkina (as N. Panova)
Professor Shubinskiy (as S. Blinnikov)
Komsorg tsekha (as L. Durov)
Golikova (as I. Fyodorova)
maty Igoya r Peresvetova (as Z. Fyodorova)
Agafon Trofimovich (as G. Gumilevskiy)
sotrudnik MURa (as L. Kadrov)
Amosov (as A. Mironov)
sotrudnik MURa (as N. Netrebin)
Vorontsov - sotrudnik MURa (as A. Nikolayev)
Slava Gorelov (as Yu. Ryabkov)
Varvara Ilyichina (as N. Yakovleva)
Sofya Petrovna (as A. Zarzhitskaya)
(uncredited)