The Doomsday Machine/ End Of The World

In The Doomsday Machine (1972), spies discover that the Red Chinese have built a doomsday machine capable of destroying the surface of the Earth, and that they plan to use it within a matter of days. In End of The World (1977), after witnessing a mans death in a bizarre accident, Father Pergado goes on a spiritual retreat, where he encounters his alien double bent on world conquest.