1972’s The Doomsday Machine… What can I say?
Well, the Chinese have developed a nuclear device that threatens to destroy the world. At the same time, the U.S is poised to launch the first manned probe to Venus. Receiving the news of China’s death machine, the U.S. pushes up the launch date, and at the last moment substitute three attractive women (scientists) for three of the originally planned crew.
Once launched, it is revealed to them all that the reason for the substitution in due to the fact that they just might be the last members of the human race, and therefore would be responsible to keep the species going.
The movie attempts to touch upon the psychological aspects of such a crew in such a situation. One of the male member loses it and in an attempt to rape one of the women, causes them both to be accidentally jettisoned into space.
Soon they are forced, due to fuel concerns, to face the reality that they may not all survive. Two of the astronauts (male and female), take on a mission to fix something on the outside of the ship, that would mean they would not return. Once the repair is complete, and they are most likely set for doom, they notice a near by Russian ship, to which they head to. Arriving at the Russian ship, they find a long deceased Cosmonaut in a functioning capsule. The commandeer the ship and head towards Venus. Of course, the Venusians don’t like this idea and stop them…
There you go: That’s 1972’s The Doomsday Machine. I’ve seen much worse, but that doesn’t mean this is good. You can watch the whole, damned thing for free online, mind you – Since I can’t find trailer anywhere, here’s the whole movie: