Geo:
Boy, add Space: 1999 and the Buck Rogers revival and you've got all the 'bad 70s hair' SciFi shows...
Even if UFO was made in the late 60s they've got those 70s hairstyles...
I had almost completely forgotten Starlost. I only had a vague memory of some strange series on PBS that I thought was called "Ark II" but maybe that was what they named it when it was broadcast in the US?