Identity Within

"Identity Within" is described as a 'lost episode' of the British science fiction comedy television series Red Dwarf.

A 'lost episode'

"Identity Within" was originally the supposed second episode in the seventh series (the episode ultimately replacing it as the second episode in this series was "Stoke Me a Clipper"). This episode was to focus on Cat as there hadn't been a 'Cat episode' before; the episode was also to address the fact that Cat had become increasingly 'domesticated' and less 'independent' over the show and had become a slightly different character (leading to some annoyance amongst certain fans of the show). It was scripted and storyboards were produced, getting further than most 'lost episodes'.

Ultimately the episode was never filmed as it was a surprisingly ambitious script for the show and the sets would have been far too costly to produce — more than the whole series itself. However the budget for the seventh series was not for seven episodes but for eight episodes, therefore the less ambitious, simpler and cheaper episode "Duct Soup" was then written and produced in its place. "Duct Soup" became the fourth episode in the series.