Lister finds himself distracted from a fit of maudlin moping over his status as the last of humanity when he inadvertently gets involved in a Love Triangle with two of the vending machines and also discovers a letter from an ex-girlfriend implying he may have fathered a child with her before they broke up.
This episode contains examples of:
- Bottle Episode: Set entirely on Red Dwarf and featuring no guest cast apart from a voiceover.
- Mama's Baby, Papa's Maybe: Drives the primary plot of the episode, with Lister trying to find a letter that will reveal who fathered his ex-girlfriend Hayley Summers' baby. Whilst he doesn't explicitly say it, his angrily denouncing Haley as a "slag" and then sucking on one finger is an obvious inferral that it turned out to be Roy's baby.
- Mood Whiplash: In the final minutes of the episode, Lister makes a tender, heart-moving speech about how he's sure his ex-girlfriend Hayley Summers would have been a wonderful mother... then reads the letter and angrily denounces her as a "slag".
- Not What It Looks Like: In the second last scene of the episode, Vending Machine #34 falls on top of Lister, and his efforts to struggle free are mistaken by both Rimmer and Kryten as some kind of weird robosexual intercourse.
- Robosexual: Vending Machine #34 is plainly attracted to Lister, whilst Lister actually finds himself making some tentative attempts at flirting both with her and with Vending Machine #23, a result of Kryten pointing out that maybe Lister should just look for a compatible partner of any species, rather than holding out hope of finding a living human woman.
- Shipper on Deck: Kryten seems quite delighted with the idea that Lister has moved on to Vending Machine #34, having encouraged him to start considering non-human consorts in the first place.