Holly invents the Holly Hop Drive (a box with Start and Stop on it), which is theoretically capable of taking Red Dwarf back to Earth immediately. The device malfunctions and Red Dwarf is catapulted into a parallel universe where society developed along matriarchal lines. Rimmer, Lister and Holly all have female counterparts here; to the cat's disappointment, however, his own counterpart turns out to be a dog. Rimmer fights off aggressive sexual advances from female Rimmer, while Lister wakes up in bed with female Lister, hung over and vaguely recollecting having sex the night before. Due to a difference in reality laws of physics, Lister ends up becoming pregnant with twins Jim and Bexley.Trivia
- This was the first episode not to have opening titles and the only one not to have an on-screen name.
- Cat watches a dream on the dream recorder at the beginning of the episode, of himself singing and dancing with Lister and Rimmer as backing singers. This was released as the single Tongue Tied in October 1993, and it reached no.17 in the UK music charts.
- The song playing in the disco is the instrumental to Tongue Tied. In the remastered version of this episode the song is replaced by heavy rock music.
- This Episode marks the first time Cat calls Rimmer and Lister by there Actual Names (In the scene where he's looking for his double).
Production Error
- When Deb and Dave Lister are talking in the sleeping quarters of the female ship, the certificate on the wall in behind Dave says "Arnold Rimmer" when it should say "Arlene Rimmer".
