The Twilight Zone: Season 5, Episode 9

5 - 9: Probe 7 - Over and Out

When Astronaut Colonel Cook crash lands on another planet, he promptly contacts his commanding officer, looking for a way back home. However, he is promptly told that nuclear war has destroyed earth, and as a result is stranded where he's at. It doesn't take long for him to discover that he's not the only one in the same predicament.