Mainwaring prepares a poster for a recruitment drive, eager to increase his platoon to a company and so gain promotion to Major. A mix-up at the printer, though, lands the platoon in trouble and Jones, the face of the recruitment drive, in a prisoner of war camp.

Mainwaring stops Jones from cashing any more cheques because his bank balance is in the red. An investigation reveals an increasing train of debtors, leading back through an orphanage Jones has been supplying with meat to Hodges.

The platoon goes camping and discovers three Nazis in adinghy on the reservoir. Pike wants to shoot through the dinghy and sink them, but Mainwaring dismisses this as unfair. Wilson must devise a more civilised strategy.

Godfrey's cottage is under threat from the building of a new aerodrome, but Frazer blackmails the minister in charge to save it.

Despite his bad chest, blocked sinuses, weak ankles and a recently acquired facial tic, Pike passes the medical exam and is set to join the army.

The platoon is chosen to play Nazis in a training film. After arriving on the set a week early, they are mistaken for real Nazis on the way home.