July 1915: Alan helps Charles to capture a German plane and its crew but is not invited to the meal in their honour in the Officers’ Mess that evening. Triggers is also unhappy at the two German officers being entertained, but follows the lead taken by his CO. After the senior officers have left, the remaining drunken officers indulge in horseplay and fail to keep close watch on the prisoners, who make an escape attempt. Alan, who is out shooting game, thwarts the Germans’ escape attempt. Rather than give him a commendation (which will expose the officers’ negligent behaviour), Triggers allows him a 48-hour pass to Paris where he calls on the Gaylion family and meets Charles's sister Kate again; they go out for dinner and dancing, but Alan is disappointed when Kate refuses to make any firm arrangement to see him again. Triggers is desperate when ‘C’ Flight is ordered on a suicidal mission to bring down a German kite balloon, despite the shortcomings of their planes, and Alan and his observer narrowly save Charles from being shot down. They hit on the idea of flying over the German lines in the captured enemy Albatros, and successfully bring down the balloon, but once again Charles gets the credit from his fellow officers, whilst Alan receives a dressing-down from Triggers for the unsporting manner in which it was achieved. (thetvdb.com)