The pumping station of the reservoir has been damaged by a bomb with Walker and Godfrey trapped inside. Hodges is determined to overrule Mainwaring's rescue attempt until it's discovered the structure of the building is very unsafe and they draw lots to decide who is going to be the ones to dig the stranded men out. After successfully reaching Walker and Godfrey, the roof caves in and everyone but Jones ends up trapped in the underground bunker that is now filling rapidly with water. But does Godfrey have a solution that is more useful than asking to be relieved?

Vanity swoops through the platoon after Parliament decide that Home Guard members who are not fit for battle must be reassigned to the A.R.P. and A.R.P wardens that are fit should be reassigned to the Home Guard. The platoon obviously don't want this to happen so resort to some rather shocking measures to fool the Area Commander into believing they are suitable to stay where they are.

During the journey home after a night at the cinema Mainwaring comes to the assistance of the clippie after Hodges makes fun of her Later Mainwaring dreams of being Napoleon with the clippie as Josephine

Rumour sweeps through Walmington, that Wilson is seeing a young girl, He goes AWOL, and is found drunk. It turns out that the girl is his daughter. Meanwhile Walker has taken a delivery of pigeons that have been stolen from Trafalgar Square, and has to find somewhere to hide them. Then the platoon assemble for church parade.

The platoon practice house clearing by using the office and the Vicar and Hodges get caught up in the action. Later during a live firing exercise the platoon are sent to the wrong map reference. When Jones discovers the mistake he drives to rescue.

The platoon are given a lecture on the German Army but because Frazer keeps on complaining Mainwaring makes him acting C.O. of the platoon Later when the Colonel asks the platoon to attend a dinner Mainwaring has to play the bagpipes.

While Captain Mainwaring holds a party at his house for the platoon the bank is hit by a German bomb. After guarding the money all night he has to find a way to transport the money to the Eastgate Branch for safety

Godfrey asks for a holiday from the platoon in order to help an old girlfriend who runs a farm to bring in the harvest. As it's important work Mainwaring brings all the platoon to help.

Lance Corporal Jones has mislaid £500 that has been collected by the merchants to build a center for the local people Frazer hypnotizes Jones and after a long search the money finally turns up.

During an exercise Mainwaring And the platoon have to find a way to gain access into an ammo dump After dressing up as firemen they are called to a real fire

When the light is left on in the church hall, Chief Warden Hodges, suspects that Mainwaring is the culprit, and takes him to court. The verger knows what happened, but Hodges will not let him tell the truth.

The platoon are asked to provide guard duty at a testing ground for secret weapons but when one of the devices gets loose the platoon have to give chase

A German pilot has baled out and is caught hanging by his parachute on the clock tower The platoon climb up to rescue him but get trapped themselves