Three boys are helping Soviet Intelligence to catch German spies during WWII.
Mishka's mother
Zhora "Brunette"
Voronov, clock master
Anastasiya, Semyon's wife
Mishka's neighbour
Ivan Vasilyevich, KGB major
Semyon, truck driver
Air raid militia
Woman on the street market
House superintendent
Security officer
Policeman
Aleksey Burakov
Uncle Petya / German spy
Valeriy Kaplunov, rocketeer
Styopka Panfilov
Security officer (uncredited)
Vaska Kozhukh
Man in the bathhouse (uncredited)
Shurka "Krendel"