Celebrated Fashion Designer Rudi Gernreich came on-board the project as creator of what were credited as the "moon city costumes", since he was a friend of Barbara Bain (Dr. Helena Russell).
Why has all of this happened to us, Professor?
Prof. Victor Bergman: The gods using us for their sport, perhaps?
Between seasons 1 and 2, uniforms and signage were altered in ways that are almost completely cosmetic (such as no rhyme or reason as to why some season two characters are always wearing jackets and others not). This makes no logical sense for a base with limited resources and few opportunities for resupply.
During the first season, excerpts for each week's episode were incorporated into the opening credits, more specifically the "This Episode" section, which was something of a Gerry Anderson trademark.
Three episodes were edited together into the movie Spazio: 1999 (1975) for release in Italy. This film, which has been released to video in Italy, features new music by Ennio Morricone.