Remember Starlost, a Canadian show?
http://en.wikipedia.org/wiki/The_Starlost
The Starlost was a Canadian-produced science fiction television series devised by writer Harlan Ellison and broadcast in 1973 on CTV in Canada and on NBC in the United States.
It was about a multigenerational ship lost in space, whose inhabitants had forgotten that they were on a ship. However the production of the show had many difficulties, and Ellison ended up disowning the show before the first episode even aired.
And, Space: 1999?
http://en.wikipedia.org/wiki/Space_1999
Space: 1999 was the first attempt since the demise of Star Trek in 1969 at producing a large-scale weekly science fiction series, and the show drew a great deal of visual inspiration (and technical expertise) from the Stanley Kubrick classic 2001: A Space Odyssey. The show's special effects director Brian Johnson had in fact previously worked on both Thunderbirds (as Brian Johncock) and 2001.