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Сергей Столяров as Vorontsov |
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Игорь Владимиров as Skvoreshnya |
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Павел Луспекаев as Kartsev, senior lieutenant of state security |
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Михаил Глузский as Ivashev |
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Сергей Голованов as Gorelov, inzhener-mekhanik |
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Пётр Соболевский as Druzhinin, assistant commander |
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ვახტანგ ნინუა as Arsen Davidovich Lordkipanidze, professor, ichthyologist |
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Сергей Комаров as Andrey Nikolaevich, professor, oceanologist |
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Антонина Максимова as Olga Ivanovna Bystrykh, doctor of the Pioneer submarine |
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Леонид Пирогов as Ivan Nikolayevich Bystrykh, father of Olga Bystrykh |
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Троадий Добротворский as Vasily Ivanovich Bazov, Colonel of State Security |
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Ирина Прейс as Sidorina, administrator of the Intourist hotel in Riga |
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Igor Bristol as Pavlik, son of the captain of the ship "Arktika" |
| Directing | კონსტანტინე პიპინაშვილი | Director |
| Writing | Николай Рожков | Writer |
| Writing | Владимир Алексеев | Writer |
| Writing | Grigori Adamov | Novel |
| Writing | კონსტანტინე პიპინაშვილი | Co-Writer |
| Camera | ფელიქს ვისოცკი | Director of Photography |
| Art | Leonide Mamaladze | Production Design |
| Art | Evgeni Machavariani | Production Design |
| Sound | ალექსი მაჭავარიანი | Original Music Composer |
| Sound | Ростислав Лапинский | Sound Designer |
| Visual Effects | Франціск Семянніков | VFX Director of Photography |
| Visual Effects | Борис Буравлев | VFX Director of Photography |
| Visual Effects | ალექსანდრე დიღმელი | VFX Director of Photography |
| Visual Effects | Leonide Mamaladze | VFX Supervisor |
| Visual Effects | Evgeni Machavariani | VFX Supervisor |
| Editing | Евгения Бежанова | Editor |
| Camera | გიორგი ჩელიძე | Assistant Camera |
| Camera | Игорь Амасийский | Assistant Camera |
| Camera | Alexander Paradashvili | Assistant Camera |
| Writing | Boris Serebryakov | Lyricist |
| Writing | Vladimir Bragin | Script Consultant |
| Art | Михаил Медников | Assistant Production Design |
| Production | Vakhtang Oziashvili | Executive Producer |
| Camera | A. Alekseiev | Assistant Camera |
| Directing | G. Gunia | Assistant Director |
| Directing | თენგიზ მაღალაშვილი | First Assistant Director |
| Directing | D. Khintibidze | First Assistant Director |
| Directing | M. Kacharava | First Assistant Director |
| Costume & Make-Up | T. Kandat | Costume Design |
| Costume & Make-Up | T. Ivashchenko | Makeup Artist |
| Art | N. Manjgaladze | Assistant Production Design |
| Crew | Veniamin Bogorov | Scientific Consultant |
| Writing | A. Shiray | Script Consultant |
| Writing | B. Karlov | Script Consultant |
