Doomsday Machine (1972 film)

Doomsday Machine, also known as Escape from Planet Earth video title, is an American science fiction film filmed in 1967 but completed without the original cast or sets in 1972.

After leaving Earth, the seven crew members of Astra deduce that they have been put together to restart the human race should the Chinese activate their device. Shortly after this, the device goes off and Earth is destroyed.As Astra continues to Venus, the crew realizes that a safe landing on Venus is impossible unless the crew is reduced to three. One of the crew members tries to rape another, at which point she accidentally gets them both blown out of an airlock. ........

Source: Wikipedia