Doppelgänger

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 of the European Space Exploration Council (EUROSEC) has been relaying the spacecraft's flight data to a rival power in the East. The West must be the first to send a mission to investigate the planet. Dr Ross concludes that he is not on Earth, but is on a Counter-Earth that is a mirror image of his.