"Two teenagers Marco and Lyuda are helping border guards to catch a spy."
Irina Mitsik
as Lyuda
Vladimir Kislenko
as Marco
Ivan Ryzhov
as Очерет
Gennadiy Yukhtin
as Red-bearded
Viktor Miroshnichenko
as Levko
Seryozha Krivoshlykov
as Gritsko
Tatyana Fateeva
as Katya
Dmytro Franko
as Kovalchuk
Vitold Janpavlis
as unknown
Andrey Derevyanko
as "Akula"
Sofya Karamash
as mother of Mark and Gritska
Oleg Mokshantsev
as diversant - kapitan mini-podlodki
Aleksei Bunin
as predstavitel' gosbezopasnosti
Alexey Omelchuk
as Alexey Vladimirovich - captain 1st rank
Anatolii Yurchenko
as kapitan 3-go ranga
Zhemma Chaika
as totya Lyudy
Alfred Shestopalov
as kontr-admiral
Nikolay Trublaini
Novel
Yuri Chulyukin
Screenplay
Evgeniy Sherstobitov
Director
Vasyl Kurach
Director of Photography
Anatoliy Mamontov
Production Design
Azon Fattakh
Original Music Composer
Vladimir Korkin
Lyricist
A. Lupal
Sound
V. Budilevich
Second Unit Director
First Assistant Director
Olga Yablonskaya
Costume Design
E. Parfenyuk
Makeup & Hair
Vladimir Tsirlin
Set Designer
N. Maksimenko
VFX Director of Photography
Viktor Deminskiy
VFX Supervisor
K. Lavrov
Underwater Director of Photography
Varvara Bondina
Editor
Valentina Rydvanova
Script Editor
Venyamin Tolba
Conductor
I. Vayntrob
Producer
