I think mutant newts causing chaos on the streets of Letherbridge could be a go-er. Chief Newt will track down TBFH and camouflage against the green walls of his office, wait until he is alone, and eat him, leaving just his shoes behind. (Leather gives newts indegestion).
Chief Newt will then move in with Al, and they will watch Dr Who re-runs together, and eat pizza. Nothing too spicy, but no mushrooms. They don't like mushrooms, newts. Quite fussy eaters, actually.
Jimmi will marry a newt (unfortunately, one with a liking for merlot
) who will break his heart and send him into a cleaning frenzy.
The rest of the newts will be accepted by the people of Letherbridge (Bit like 'Men in Black'), and Mrs T will return, to become Practice manager. Val will be replaced. By a newt. Barry won't notice.
I need to get out more
(I tried really hard to find a newt emoticon, and failed
)