Lister tells Cat they are going to chase after Rimmer in White Midget, but we then see them flying in Blue Midget. In the Remastered version, Lister's voice is dubbed over so he says "The Midget" instead of "White Midget". The actual mistake came from the writing and preparation of the series. Originally the new smaller ship that would be used was a White Midget, a similar version of the Blue Midget, but the producers then invented the Starbug which would be bigger and allow for more room to film inside. Unfortunately the line wasn't changed in this episode.