Roy Thinnes and Ian Hendry star in this classic sci-fi directed by Robert Parrish. When a previously unseen planet is discovered on the opposite side of the sun,* a European space agency hurriedly dispatches a spaceship to investigate. But when astronauts Colonel Glenn Ross *(Thinnes) and John Kane *(Hendry) are forced to crash-land,* their dazed condition leads them to believe they're back on Earth. It's not long,* however,* until they both discover the shocking truth: the undiscovered planet is actually a doppelganger of the Earth,* similar in every respect,* but a mirror-image.
