Doppelgänger

A planet is discovered in the same orbit as Earth's but is located on the exact opposite side of the sun, making it not visible from Earth. The European Space Exploration Council decide to send American astronaut Glenn Ross and British scientist John Kane via spaceship to explore the other planet.

Cast

Roy Thinnes

Ian Hendry

Patrick Wymark

Lynn Loring

Loni von Friedl

Franco De Rosa

George Sewell

Ed Bishop