A skutter goes berserk and rewires all the ship's circuitry. So when Lister orders a chocolate bar from one of the snack dispensers, he accidentally triggers off the ship's self-destruct sequence. There is only one way to diffuse the bomb, but it involves Lister lending his body to a female officer. This gets Rimmer thinking...

Kryten discovers his built-in expiry date is almost up and he has less than twenty-four hours to live. The crew are determined to give the mechanoid the best night of his life. For the first time, he experiences true pleasure and wants to delay his ascent into Silicon Heaven, the resting place for all electrical appliances. Then his replacement shows up..