Me² (S01E06)

Rimmer, the odious hologram, creates his perfect companion – an identical duplicate of himself. He moves out of the quarters he shares with Lister and starts rooming with his doppelganger. At first things are blissful, but the course of true love never runs smoothly, and soon the two Rimmers find themselves locked in a conflict so fierce, only one of them can survive. (iTunes)