Trivia

After the series ended, the BBC wiped the master tapes, common practice at the time. There were no known recordings of the show at all until 1993, when relatively low-quality NTSC copies of the episodes were found at an American TV affiliate (the show 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 programme 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).

The series had strong connections to Doctor Who (1963). It was made by the Jon Pertwee era production team of Barry Letts and Terrance Dicks between that programme's tenth and eleventh seasons. It also featured regular Doctor Who (1963) director Christopher Barry and writer John Lucarotti.

Script editor Terrance Dicks recalled that the format was to take a realistic look at life 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, long-lived shows, whilst Moonbase 3 (1973) managed to be something totally different indeed, lasting only one six-episode season which was never even repeated at the time.

Dudley Simpson's theme-tune for the series was released as a single in October 1973 by BBC Records (RESL 13). The B-side, "The World of Dr Who", was a suite of his recent scores for that series. It subsequently appeared, strangely, on 1975's "Music From BBC Children's Programmes" album (REH 214).