In this episode, Percy continues officer training. He practices code, unfortunately no one seems to be able to break it. I guess that means he knew what he was doing. He spends his third Christmas away from home, this one much more pleasant than the first two... He is with his ummm, fiancee, Dorothy.

Three of the Aussies are suspended from the Officer's Training School at Cambridge. Two for sleeping in and one for swapping a blown light bulb for a good one from the mess.