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.
Visible crew/equipment: In episode 1, "Computer Logic", there's a scene in which Austin & Michelle step into a computer convention, where a hot-shot software designer, Mr, Blaine, is delivering a sales pitch from his wheelchair. In one shot the boom microphone can be seen dipping deeply into frame.