Eric Swan who played the new security guard in the first episode returns.
Sarge needs a heart bypass but cannot afford to go private. So Swan is brought in but he is only a first year medical student, there is a full moon but he would do it for £500.
Bell was given the task to check the calendar for the full moon but he was never good with numbers. Swan has to fight against his blood lust while Carter and Bell poke fun about him being a werewolf.
Enjoyably silly and surreal. Bell trying to do Travis Bickle impressions in the mirror and getting confused. There is also the return of the cod Shakespeare scheming by Carter and Bell.
Sarge bids farewell again in the style of Dixon of Dock Green.