Continuity mistake: When Lister punches up the Leviathan's destination, it reads 'Theta 4'. However, in the next scene in Starbug's medibay, Lister says that the Leviathan was headed to Delta 7. (00:23:10 - 00:24:25)
Red Dwarf (1988)
5 continuity mistakes in Epideme - chronological order
Factual error: While it is true that lithium carbonate can be used to treat depression and other psychiatric disorders, it cannot be administered in gaseous form. It is a very stable salt and only starts to form vapour at 1,310 degress Celcius. Spraying it about as a 'mood stabliser' at that temperature, as Kryten does, is going to kill everyone on the spot.
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Trivia: It was rumored that Alfred Molina and Alan Rickman wanted the part of Rimmer. Lee Cornes also auditioned for this role (he later guest starred on the show), as did Hugh Laurie. Robert Bathurst, Norman Lovett and David Baddiel auditioned for the role of Lister.
More questions & answers from Red Dwarf
Answer: It's Queen Victoria, someone any Englishman would recognize, and needed no introduction.
Kryten was introducing the "people" to Rimmer. Rimmer isn't an Englishman; he's not even from Earth; he's from Io.