The annual fitness test proves too much for Gary. Physical trainer, Corporal Fox, doesn't hold back in telling him how bad a shape he's in so, humiliated and determined to save face with the boys, Gary challenges Fox to a race, with a demotion on the cards if he loses. With the help of Jacko, Charlie and new recruit Mickey, Gary finally faces up to an uncomfortable home truth and makes a confession to his dad and Julie, but will it be in time to help him win the race and keep his job?
