Barrier of the Unknown

Barrier of the Unknown
Directed by	Nikita Kurikhin
Written by	Dmitri Radovsky
Starring	Vyacheslav Shalevich Ella Sumskaya Nikolai Gritsenko Aleksandr Grave
Cinematography	Samouil Rubashkin
Music by	Mieczysław Weinberg
Production company	Lenfilm
Release date	1961 (1961)
Running time	108 minutes
Country	Soviet Union
Language	Russian

Barrier of the Unknown (Russian: Барьер неизвестности, romanized: Barier neizvestnosti) is a 1961 Soviet science fiction drama film directed by Nikita Kurikhin.^[1]

The film tells about the creators and testers of the Soviet piloted hypersonic airplane "Cyclone". In the USSR, there were many such programs which were left unfinished, but all the characteristics of the Cyclone (speed, altitude, etc., except for "radioactive combustion accelerators"), including flight characteristics (launch from a carrier aircraft) are exactly borrowed from the North American X-15.