The following weekend the platoon are in the countryside to try out their bivouac tents. To Mainwaring's annoyance, the Chief Warden's van appears - he has brought out the Sea Scouts for a camp of their own. This will interrupt with the platoons male bonding, as 'comrades under the stars', and he suspects Hodges has brought them to that specific spot to delibratly upset him. The joke is on Hodges, however, when he runs out of petrol and is forced to spend the night out there as well.
In the night, a Nazi plane appears overhead, and they get up with their rifles. However there is nothing they can do about it, and go back to bed. 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. Requisitinoing the Sea Scouts boat, Mainwaring and his men go out to parley with the pilots, using Hodges as an interpreter because of his knowledge of German. Their efforts meet ridicule and the Germans do not surrender, and instead laugh when Hodges falls in the water. It appears the Germans are waiting for nightfall so they can ship ashore, and escape.
Knowing that they cant 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. WIth predictably disastrous results, the plan goes wrong, and Hodges once again falls into the water - this time he is taken prisoner by the German raft, who then proceed to open fire on the British boat. An apoleptic Mainwaring orders his own men to fire "Let 'em have it men!", but Wilson points out they will hit Hodges.
Pike comes to the rescue, firing a number of arrows into the dinghy, causing it to start sinking. At last the Germans, realsing the game is up, try to surrender. Mainwaring shouts out to Hodges "ask the Germans if they can swim?" to which Hodges replies "never mind them! I'm the one who cant swim!