Whilst UFO does have a moonbase most of the action takes place on Earth, though it has been a number of years since a last saw some of the show so I could be mistaken.
You are correct.
There was Bryan Fuller's failed pilot movie High Moon, which aired on Syfy last year and was very loosely based on a young-adult novel called The Lotus Caves by John Christopher. It was about a Lunar colony, but it was pretty terrible.
Another Fuller pilot not available on disc. Maybe one day they will put out a box-set of "Failed Fuller". I would buy.
