SPOILER: The Remastered version replaces the second Lister who appears at the end with a bouncing ball and a caption explaining that the second Polymorph, stowed away in Lister's underpants drawer where it died of old age many years later. According to
Doug Naylor, the reason the ending was changed in the Remastered version was that he was getting tired of fans asking what happened to the second Polymorph.