The ship receives a message informing them that Kryten's expiry date has come, and he will shortly shut down and be replaced. Lister decides to hold a party in his honour, but things don't quite go as expected.

Kryten receives a video message saying he is to be replaced with the newer Mechanoid model - Hudzen. He doesn't feel particularly upset though, as he believes that when electrical appliances reach their expiry date, their souls go to Silicon Heaven and they are eternally rewarded.

Lister decides to give Kryten one brilliant last night before he's replaced and the crew team together to organise a party. Of course, things never turn out how they should and Hudzen is prevented from taking over when he arrives.