- Country: Soviet Union
- Genres: Sci-Fi
- Release: 1957-04-05
- Director: Dmitriy Vasilev
- Writers: Igor Lukovskiy
- Language: Russian
- Stars: Ivan Pereverzev , Konstantin Bartashevich , Mikhail Astangov , Apollon Yachnitskiy , Danuta Stolyarskaya , Yelena Izmailova , Pavel Samarin , Ye. Tarkhanov , Yan Yanakiyev , V. Tkachenko
- Runtime: 76 min
- Awards: N/A
- AKA: Geheimnis der ewigen Nacht , Тайна вечной ночи , Ikuisen yön arvoitus (Finland) , Tayna vechnoy nochi , El misterio de la noche eterna (Argentina) , Tajemnica wiecznej nocy (Poland) , Az örök éjszaka titka (Hungary) , The Mystery of the Eternal Night
- Plot: An underwater explosion at the bottom of the Pacific ocean causes the marine vegetation to grow out of control, a probably cause of which - radiation. An underwater plant species is discovered that resist radiation.
- IMDB:tt0165970
Tayna vechnoy nochi Cast · · · ALL
Dmitriy Vasilev
Director
Ivan Pereverzev
Konstantin Bartashevich
Dmitriy Petrovich Rusanov
Mikhail Astangov
Apollon Yachnitskiy
Danuta Stolyarskaya