After the series was canceled, the BBC wiped all of its master tapes, as was common practice at the time. There were no known recordings of this program at all until 1993 when relatively low-quality NTSC copies of the episodes were found at an American TV affiliate (the series was a co-production between the BBC and the "Twentieth Century Fox Television Division in association with the ABC Owned Television Stations" and the latter had retained copies). All examples in existence of the program are taken from these tapes.
The costly Moonbase spacesuits were reused in the Doctor Who (1963) stories "Invasion of the Dinosaurs" (1974) and "The Sontaran Experiment" (1975).
Script editor Terrance Dicks recalled that the plan was to take a realistic look at what life would be like on a Moonbase, adhering to scientific principles and eliminating any 'Bug-Eyed Monster' concepts: something totally different from Doctor Who (1963) or Star Trek (1966). He wryly reflected that in this respect the series was a great success: those were two hugely popular shows, whilst Moonbase 3 (1973) managed to be something totally different indeed.
The science adviser for the program was James Burke, a BBC science journalist who had covered the NASA program. He took great pains to ensure the plots and scenes were scientifically plausible.
Some of the dialog used in rocket launches on the program was taken directly from NASA Apollo mission transcripts.