Cammy, an old adversary of Gary's, is posted to the barracks and old rivalries are soon restored in the form of a brawl. Sergeant Thomson punishes them both but a series of tit for tat exchanges follow. Things quickly get out of hand when army property is defaced and Gary is the one blamed. With the boys unable to provide an alibi and Thomson refusing to believe that Cammy is to blame, Gary finds himself in serious danger of being kicked out of the army forever.

A posting to Germany hasn't quite lived up to the excitement levels of Afghanistan and Iraq and Gary is desperate to get home. But when Charlie announces that he's just got engaged, the final week gets a lot more interesting. Charlie's bride-to-be makes quite an impression, and while Mickey thinks she seems fun, Jacko is less generous with his feedback. Gary's initial misgivings are replaced with his excitement at being asked to be best man, and he starts making preparations for his special day.