Sir Godber, egged on by his zealous wife, Lady Mary, announces sweeping changes to the centuries of college tradition, much to the concern of Skullion and the Fellows, who plan a counter-attack on the proposed contraceptive machines, women students, and canteen.

Mrs Biggs is not within earshot, but nevertheless has sensed that something is up from Zipser's awkward behaviour around her every time she comes to clean his rooms and especially when she teases him sexually, such as when she asks him to help take off her bright red PVC raincoat in the tight confines of the "gyp".

Meanwhile, having been advised to pick up a foreign student, so as to avoid his lust for Mrs Biggs, after a series of frustrating attempts to buy condoms Zipser drunkenly acquires two large boxes.

Unfortunately, while undressing, she has lit the gas fire, which takes a short while to ignite the inflated condoms stuck in the chimney, causing an explosion that demolishes the Bull Tower and kills her and Zipser in their moment of passion.

When Skullion is visited by the college officials with the good news, he thinks they have found out his involvement with Sir Godber's death and whilst they are telling him about his great promotion it causes in him a debilitating Porterhouse Blue, and he suffers paralysis.