Overview: The arrival of new Station Officer Nick Georgiadis ruffles a lot of feathers. A strict disciplinarian, he finds fault with the appearance, sloppy practices and conduct of everyone from Hallam down. The atmosphere is hostile. Relief comes in the form of a shout to a sewer where three men lay injured by a gas explosion. Two had gone upstream to repair a fault but gas started to fill the sewer chamber. The noise from their work prevented them from hearing the gas detector. The result is that the pair are pinned under rubble while the third has a severe headwound. Under Nick's impressive command, Blue Watch free the trio. Afterwards, Nick has words with Hallam about their professional relationship and at home Sandra's constant nagging about the kitchen doesn't make Hallam a happy man. Kevin becomes involved in a brawl with his sisters boyfriend Rick and at the next roll call, Nick sends the battered and bruised Kevin home.