Red Dwarf (1988)
1 question in Future Echoes
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.
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.
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Chosen answer: It can, but that doesn't mean that it's supposed to. At the time of the episode, Red Dwarf's thrusters have been firing continuously for millions of years, accelerating the ship until, in this episode, it finally achieves light speed. This is not a speed that the Dwarf was ever intended to attain, hence the need to slow it down again before the stresses tear it apart. If they wanted to hit light speed again, it would take the same sort of length of time to accelerate back up to that speed. Technically possible, but not exactly practical.
Tailkinker ★