During the construction of an oil pipeline, an unexploded bottom mine was discovered. The dangerous situation brings back memories of wartime events for diver Gnat.
| Actor | Role |
|---|---|
 Anatoliy SolovyovGnat Petrovich Marchenko | Gnat Petrovich Marchenko |
 Ninel MyshkovaMariya | Mariya |
 Vsevolod SafonovMarek | Marek |
 Valeriy BessarabVolodya Senkin | Volodya Senkin |
 Georgiy DrozdKochet | Kochet |
| IInna ZhuravelValentina Georgiyevna | Valentina Georgiyevna |
| AA. MusatovaNyura | Nyura |
| PPavel KlyonovBubnov | Bubnov |
 Boris MirusNestor Grigoryevich Nazarchuk | Nestor Grigoryevich Nazarchuk |
 Petro VesklyarovIvan Lapshin | Ivan Lapshin |
 Lev PerfilovProkhazka | Prokhazka |
| GGeorgiy PolinskiyLepyoshkin | Lepyoshkin |
| VVladimir DanchenkoSovyetskiy general | Sovyetskiy general |
 Domian KozachkovskiyFashistkiy general | Fashistkiy general |
 Viktor StepanenkoNot listed | Not listed |