"Stargate: Continuum" is a 2008 Canadian-American military science fiction direct-to-video film in the 'Stargate' franchise. It is the second sequel to television series 'Stargate SG-1' following "The Ark of Truth". It is directed by Martin Wood, director and producer of many episodes of 'Stargate SG-1' and 'Stargate Atlantis', written by 'SG-1' and 'Atlantis' creator Brad Wright, and produced by Wright and "Ark of Truth" director Robert C. Cooper.
The film is a time-travel adventure in which Ba'al travels back to 1939 to create an alternate timeline in which Earth never establishes their Stargate program, and to take control of the Goa'uld Empire. The only people to remember the truth, the SG-1 team attempts to reinstate the original timeline. The film stars the main cast of the show's last season, with the return of Richard Dean Anderson as Jack O'Neill.
Near the end of this movie, there was this exchange of dialogue:
I was hoping that we could go over the plans for the new moonbase.
Even though the timeline was disrupted by Ba'al until it was set right by the SG-1 team, it was basically happening in 2008, the year in which the video came out. Nine years earlier, Moonbase Alpha suffered severe damage when the nuclear waste dump on the far side of the Moon exploded. (As you probably know, this happened in the first episode of 'Space: 1999'.)
So when Sam mentioned "the new moonbase", that determiner suggests that there was at least one previous moonbase. And a moratorium on building a new moonbase which lasted about nine years seems about right.
Now some of you might think that there shouldn't be any moonbase without a moon. But that's because you must think everything that happened after that explosion as seen in 'Space: 1999' actually took place. But in the grand scheme of things in the Toobworld Dynamic, Commander Koenig of Moonbase Alpha had been seriously injured in the explosion and everything we saw in the show was part of his coma dream.
So the Moon has always been up there and this relieves the Dynamic of such an astral Zonk. Except for the beginning, 'Space: 1999' was a dream series like 'Newhart' which only had its reality in the ending.
And when Jack asked "What moonbase?", it was because he had been out of the loop when it came to the acceptance of the concept. But now Sam wanted his input on its construction and command organization structure. (She probably wanted his advice as to whether there should have been another CONTROL division based there as there had been at the first moonbase.)
So the way I heard that simple exchange, it made a theoretical reference to the history of Moonbase Alpha.....
This new moonbase would contain a weather station which will be attacked by the Cybermen in 2170. Twenty years later, the moonbase was attacked by the Ice Warriors. Both times the moonbase was saved by the second incarnation of the Doctor. (As seen in the 'Doctor Who' adventures "The Moonbase" and "The Seeds Of Death".