This is the only Hammer film set in the future.
The film takes place in May 2021.
Although the women's fashions in the film were somewhat influenced by then-current couturiers, very similar fashions - and colored wigs - appeared in Gerry Anderson's live action television series, UFO (1970), shot contemporaneously, and "Moon Zero Two" lead Catherine Schell wore an outfit very similar to that of Kemp in this film when she starred in the second series of Anderson's Space: 1999 (1975) as the alien shapeshifter Maya.
The film was described by the producers and director as a "Western in space" complete with claim jumpers, showdown-type gunfights, a hired gunslinger and even dancing saloon girls.
Actor and dancer Yvonne Castelle was paralyzed for life after an accident on the film's set, remaining bedridden for 10 years.