Kariev cannot defend his PhD thesis because he does not have the necessary theoretical basis for his idea. Young geologists - Kurov, Mukhamedov and Saraev, who worked in the geological party under the leadership of Kariev, help him, showing the ability to solve major scientific problems.
| Actor | Role |
|---|---|
 Makil KulanbayevСедой | Седой |
| KKuman TastanbekovМух | Мух |
 Oleg AfanasyevТолстый | Толстый |
 Boris GitinКур | Кур |
| RRoza KosmambetovaNot listed | Not listed |
| MMikhail Matyushevskyгеолог | геолог |
| AA. Boreevгеолог | геолог |
 Nurzhuman Ihtymbaevгеолог | геолог |
| AAleksandr DobrosovЛуцис | Луцис |
| IIskander TynyshpaevИса-ага | Иса-ага |
 Daniil NetrebinNot listed | Not listed |
 Raisa MukhamedyarovaNot listed | Not listed |