Moonbase Alpha was a scientific research station on the moon which was responsible for storing all of earth’s nuclear waste. In 1999 the accumulated waste somehow reaches critical mass and explodes forcing the moon out of orbit and away from the solar system.
The base is self-sufficient enough to survive and after passing through various forms of black holes and space warps the moon is in completely unknown space.
The Alphans encounter friendly and hostile aliens during their travels but they are ultimately going nowhere.
Space: 1999 was created by Gerry and Sylvia Anderson, and was first broadcast in the UK in 1975.