David Ross, who originally played Kryten in the second series, was considered to do a voiceover for Kryten when he is returned to his factory settings. But Robert Llewellyn was able to imitate Ross' original accent.
It seems that not everything sold on Red Dwarf is by JMC as the muffin comes from Tesco.
Holly only has one line in this episode and only his voice is heard.
First time a blue midget is seen taking off. (Running while flapping arms)
Unusually, Robert Llewellyn is listed before Danny John-Jules in the end credits.