When scientists a hundred years into the future discover a "duplicate" Earth on the other side of the Sun, the
stage is set for tense, science fiction adventure and suspense. Determined to find out what this new world is
like, the Western nations of Earth set up an expedition headed by former astronauts Roy Thinnes and Ian Hendry
to reach the new planet. All goes according to plan until the spaceship makes a crash landing on a planet some
three weeks earlier than expected. Have the space travelers actually returned to Earth or are they on some
strange mirror-image world where they must prove who they really are or die trying? This imaginative space
adventure offers a journey few will ever forget.