In the opening moments of the episode, the Cat reveals that he educated himself because there was no-one else around, yet in 'The End' the Cat tells Lister that he learnt about Frankenstein (Lister's cat) and the Virgin Birth whilst he was at 'kitty-school'.Response: It's likely that Cat's education, at the hands of the elderly priest seen in 'Waiting for God' was rudimentary and he meant that he taught himself the important stuff like fashion.
Kryten: I take it we're speaking with the Epideme virus?
Epideme: Give that man an eyebrow! Hey, I'm feeling generous: Give him two!
(The gang are walking among the corpses of the Leviathan's crew)
Kochanski: I've never seen anything like this!
Lister: You weren't around for my last party, were you?
Lister: What? You absorb knowledge from every person you kill?
Epideme: So, as you can appreciate, killing you ain't exactly a career highlight... No offence, but when you're a virus there's not much call for knowing how to open a lager bottle with your anus.
Lister: I've just been molested by Tutankhamen's horny grandma! Of course I'm not allright!
Lister: My left arm. My left arm I said. That's my right. What kind of Navigation Officer can't tell left from right!?
Writer Paul Alexander had written this episode before knowing Chris Barrie was leaving the show. If Barrie had stayed on, Rimmer would have been the hero, having Kochanski's plan of letting the virus infect him, but then he would have deactivated himself, leaving the Epideme suspended in the air for Cat to destroy with a bazookoid. As Rimmer's role was lessened, the arm-chopping scene was put in instead.