Definitely an English movie in color. I’m pretty sure the movie was about a deep space multinational crew, early on in the movie they get a communication from earth saying there was a nuclear war and earth is pretty much toast. The rest of the movie is the crew killing each other I think. The last one alive is a girl and she actually discovers they aren’t on a spaceship but in a bunker where she walks down a hall with a man sitting at a desk with a computer but when she gets to him he is a skeleton and outside the world is in ashes, the end. Sorry for the crumby description can’t really remember much.