As Mainwaring tries to demonstrate the use of the platoons new bivouac tents, and the best way to eat a hedgehog, Mr Blewitt objects to their "improper" use of the garden and repeatedly reports them to the irritated Vicar.
This will interfere with the platoon's male bonding, as "comrades under the stars", and Mainwaring suspects Hodges has brought them to that specific spot to deliberately upset him.
The following morning, they spot three Nazi pilots floating on a rubber dinghy in the middle of the nearby lake, clearly having bailed out of the plane the previous night.
Their efforts meet ridicule as the Germans, despite rising their hands, do not surrender and instead laugh when Hodges falls in the water while trying to tie a rope to their dinghy.
Knowing that they cannot shoot men with their hands up, the platoon come up with an elaborate plan involving Jones swimming underwater and bursting the dinghy with his bayonet.