Doppelgnger is a 1969 British science fiction film directed by Robert Parrish and starring Roy Thinnes, Ian Hendry, Lynn Loring and Patrick Wymark. Outside Europe, it is known as Journey to the Far Side of the Sun, which is now the more popular title. In the film, a joint EuropeanNASA mission to investigate a planet in a position parallel to Earth, behind the Sun, ends in disaster with the death of one of the astronauts Hendry. His colleague Thinnes discovers that the planet is a mirror image of Earth.
In 2069, the unmanned Sun Probe locates a planet lying on the same orbital path as Earth on the opposite side of the Sun. Dr Kurt Hassler Herbert Lom of the European Space Exploration Council EUROSEC has been relaying the spacecrafts flight data to a rival power in the East after tracing the transmissions to Hasslers laboratory, Security Chief Mark Neuman George Sewell catches the scientist in the act and kills him. EUROSEC director Jason Webb Patrick Wymark convinces NASA representative David Poulson Ed Bishop that the West must be the first to send a mission to investigate the planet. With EUROSEC member states France and Germany unwilling to provide financial support, Webb obtains majority funding from NASA American astronaut Colonel Glenn Ross Roy Thinnes and British astrophysicist Dr John Kane Ian Hendry, the head of the Sun Probe project, are assigned to the mission.Launched from the EUROSEC Space Centre in Portugal in the spacecraft Phoenix, Ross and Kane spend the first half of their sixweek round trip in stasis with Heart Lung Kidney machines managing their life functions. Three weeks after launch, the astronauts are revived in the planets orbit. Scans for the existence of extraterrestrial life are inconclusive, and Ross and Kane decide to make a surface landing. As the astronauts descend through the atmosphere, an electrical storm damages their Dove lander shuttle, which crashes in a mountainous region that is revealed to be Ulan Bator, Mongolia. When an airsea rescue unit returns Ross and Kane, the latter critically injured, to the Space Centre, it is apparent that the Phoenix mission has come to an untimely end after three weeks and that the astronauts have returned to Earth. ........
Source: Wikipedia