The Delta VII was an unseen derelict spaceship or space station scavenged by the boys from the Dwarf.
Kryten obtained some gender-swapping technology from the Delta VII. With this he proposed that he made Cat into a woman so that Dave Lister, the last human in the Galaxy, could mate and produce offspring. Kryten thought that he would be good at the procedure since it involved a lot of 'folding', and Kryten was so good at folding sheets.
Unsurprisingly, Lister and Cat rejected the idea, but it did create an argument as to who would make the more attractive woman. ("The Promised Land")
Trivia[]
- It is possible that the Delta VII is the same as the Medi-Station discovered by the Dwarfers earlier in Series XI and which had contained medical technology such as the Personality Tuck Machine.