Mainwaring gives a lecture on field craft in the vicar's garden, covering what to eat and how to erect a tent. Later, apart from having to put up with the vicar, verger, Hodges, and a gang of boy scouts, their field manoeuvres are interrupted by three downed German airmen trapped in their dinghy in the middle of the lake. 'Hӓnde hoch! Hӓnde hoch!'
