Robert Farnon's 'Experiment In Space—Vega' makes an appearance, as do excerpts from previous Joe 90 and Stingray scores, composed by Barry Gray. The ditty hummed by Bill Lowry is 'A Wand'ring Minstrel I' from the Gilbert and Sullivan comic opera The Mikado. Production notes This story, Johnny Byrne's favourite of his contributions to the series, was based on real-life events surrounding the 1972 plane-crash of an Uruguayan rugby team in the Andes Mountains. After ten weeks, sixteen survivors (out of forty-five passengers) were rescued; shortly after, the truth came out they had resorted to cannibalism to stay alive. The fact that, after 'a million years of civilisation', the Darians could commit technological cannibalism formed the episode's primary theme. This tale was combined with a spin on racial purity (for 'Darians' read 'Aryans') and placed in similar circumstances as author Brian Aldiss' novel Non-Stop, involving two disparate cultures existing on a generation ship. Guest star Joan Collins was already a science-fiction icon at the time of the shoot, having appeared as Captain Kirk's doomed love Edith Keeler in the Hugo Award-winning Star Trek episode "The City on the Edge of Forever" in 1967. A prolific actress, she had appeared in dozens of films and television programmes produced on both sides of the Atlantic before taking the role of the Darian aristocrat, Kara. In 1981, she would assume the defining role of her career: the scheming, flamboyant man-eater Alexis Carrington in the American prime-time television drama Dynasty. The hull of the spaceship Daria is seen to include one of the conical atomic-waste-pit caps, as seen in Nuclear Disposal Area Two during "Breakaway"; the model's large central dome structure would be used in the second series as the 'transference dome' building seen in "Journey to Where". The Survivors' settlement area was revamped from the expansive Gwent interiors constructed for the previous episode, "The Infernal Machine". The eternal flame in the Shrine of Knowledge burned in the shell of the Ariel satellite prop seen in "The Last Sunset". Two actresses playing background Darians, Linda Hooks and Jenny Cresswell, would make subsequent appearances in the series: Hooks (Miss International of 1972) would be cast in the remounted scenes of "The Last Enemy" as a member of Dione's glamorous crew; Cresswell (Miss Anglia of 1969) would appear throughout the second series as a background extra. Novelisation The episode was adapted in the sixth Year One Space: