In a cricket match between the platoon and the ARP wardens, Chief Warden Hodges has a secret weapon up his sleeve: he plans to recruit Ernie Egan (played by England's fast bowler Fred Trueman), a professional cricketer. But all does not go as planned.

LCpl. Jones has problems with his bank account. When Mainwaring tries to help, he finds that the trail leads through the platoon, on to Mrs. Pike, and ends with Mr. Hodges.

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

While the platoon is at a training camp, Mainwaring gets drunk with the other officers during the night and misses the live grenade training the following morning. Later during the training one of the grenades lands in Jones's van and Mainwaring rides to the rescue.

At the bank the door to Mainwaring's office is replaced with a paper door. Adding insult to injury of not having a proper door, Mainwaring is even more annoyed at the fact that Pike, the Colonel and Jones manage to destroy it within minutes of it being installed. Godfrey's cottage is due to be demolished to make way for a new airfield but no-one can bring themselves to break the news to him until Jones finds out that he already knows. In the end Frazer, knowing the family history of the General in charge, blackmails him to get the airfield moved 200 yards.

Mainwaring has visions of promotion for himself and Wilson and of expanding the platoon into a company, so he embarks on a recruitment drive. A poster is drawn up and Jones is voted to be on it. Unfortunately a mix-up at the printer's results in Jones being branded an escaped prisoner of war instead.

When a low-flying German aircraft attacks Warmington-on-Sea, the platoon, under the command of LCpl. Jones, fires at the aircraft and uses up all its ammunition. Mainwaring is furious and orders an investigation.

The platoon has gone to a camp to undergo an efficiency test. Meanwhile Walker has a van load of onions he's sold to Hodges, who isn't letting them out of his sight, thus he has pursued the platoon to the camp. Later, with no blank shells to use on the test, Mainwaring has a brainwave regarding what to use as ammunition!

The platoon finally gets to grips with the enemy when it has to guard some Nazi submariners. But the Germans turn the tables on Mainwaring and try to escape, resulting in Jones ending up with a grenade down his trousers.

When Jones arrives at the bank to deposit £500 from local shopkeepers for the servicemen's canteen, he realises his packet contains half a pound of sausages instead of the money.

The Colonel orders Mainwaring and the platoon to make a training film with a couple of well-known actors, but unknown to Mainwaring they are to play the Germans. Mainwaring refuses to take part but the rest of the platoon is still ordered to do so. When the filming is cancelled, Mainwaring and the men, still dressed as German soldiers, are spotted in the local pub and the alarm is raised.

The platoon is told to be on the lookout for any abandoned parachutes so Walker tells Mainwaring that he has found one. They also take on a dog which they use to track an escaped German pilot but accidentally arrest a bird watcher.

As all the road signs have been removed from the area, the platoon is ordered to put up temporary ones to help a large convoy on manoeuvres that is due to drive through the area, but due to the condition of the ground Jones's van gets stuck in the mud.

When news that the Prime Minister is to pay a visit to the area a shooting contest is held to see which of the local platoons will form the Guard of Honour. Walker gets a crack shot from the theatre touring show (Barbara Windsor) to take part as a member of the platoon but a surprise is in store for everybody.

Sgt. Wilson becomes a manager of his own branch and gets a commission on the same day. But hours later his new branch is destroyed during an air raid. Mainwaring offers him his old job back and his former rank.

Capt. 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 also interrupted by three German airmen who have been shot down and are trapped in their dinghy in the middle of the lake. "Hӓnde hoch! Hӓnde hoch!"

LCpl. Jones goes to a reunion of his old regiment. While he is away an old comrade who fought in the same battle joins the platoon and accuses Jones of cowardice. Upon his return Jones has to tell the real story.

Godfrey asks to leave the platoon because he doesn't want to fight. Mainwaring is furious and the rest of the platoon shuns him until they find out that he was a hero from The Great War. So he rejoins the platoon as a medical orderly.

The platoon dresses up as Morris Dancers as part of a carnival to raise money for the town's Spitfire fund, which is still £2,000 short. A Lady Godiva figure will lead the parade but there is confusion over who this will be.

Capt. Mainwaring has gone into hospital for an operation on ingrowing toenails. Meanwhile Wilson as acting CO has asked the vicar and the verger to join the platoon to make up the numbers. Note: This is the first episode not to feature James Beck as Pte. Joe Walker, although Beck is still included in the closing credits.

When a relative of Sgt. Wilson dies, he inherits his title. Then, when a Russian factory worker visits the town to boost Anglo-Russian relations, Mainwaring is asked to present the key to the town - until the mayor hears about Wilson's title, and asks Mainwaring to step down.

Vanity swoops through the platoon after Parliament decides that Home Guard members who are not fit for battle must be reassigned to the ARP and ARP wardens that are fit and able should be reassigned to the Home Guard. The platoon obviously doesn't want this to happen so resort to some rather shocking measures to fool the Area Commander into believing the men are suitable staying where they are.

Capt. Mainwaring decides to enlist women to the platoon to assist with the war effort. After initial interviews go rather less than satisfactory, a Mrs. Fiona Grey walks into his office and into his life. Mainwaring is flattered that Fiona not only has similar views to him about the war, but also is complementary about his persona. He finds himself falling in love. Unfortunately the men very quickly realise and start to gossip behind his back and Fiona decides to leave, but can Mainwaring get to the station in time to stop her?

Sgt. Wilson overhears Mrs. Pike telling Frank that she is expecting a child. Wilson assumes that she is pregnant and that he is the father, but it turns out that she is looking after an evacuee. Mainwaring advises that Wilson marry her, until she clears up the misunderstanding.

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

Frazer is busy counting up his earnings when his doctor visits and accidentally knocks over a money box revealing that Frazer is far from poor. Concerned, the doctor alerts Mainwaring, who alerts Jones and very soon Frazer's fortune is the subject of town gossip. Eventually the platoon, Hodges, the vicar and the verger are spying on Frazer to see what he does with his money. Will they get their hands on it, or does Frazer have a sneaky trick up his sleeve?

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 are 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 rapidly filling with water. But does Godfrey have a solution that is more useful than asking to be relieved?

The platoon is asked to provide guard duty at a testing ground for secret weapons, but when one of the devices gets out of control the platoon has to give chase.

Rumour sweeps through Walmington-on-Sea 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 delivery of pigeons that have been stolen from Trafalgar Square, and has to find somewhere to hide them. Then the platoon assembles for church parade. What could go wrong?

During a Wings For Victory fundraising event the platoon decides to stage a re-enactment of the battle between St. George and the Dragon, but friction starts when Hodges and the wardens plan the same thing.

The platoon is given a lecture on the German army but because Frazer keeps on complaining, Mainwaring makes him Acting CO of the platoon. Later, when the Colonel asks the platoon to attend a dinner, Mainwaring has to play the bagpipes.

The platoon captures a runaway barrage balloon, and while trying to secure it, Capt. Mainwaring is carried aloft.

The search begins for a butterfly spring for a Lewis gun that Frazer has lost whilst cleaning it. The trail leads them through Frazer's workshop to a Funeral Director, to Mr. Bluett's dining room table, to a graveyard. The platoon stops at nothing, committing various crimes including house breaking and grave robbing to get the spring back. But will they find it in time to save Frazer from a court martial?

Capt. Mainwaring promotes Frazer to Lance Corporal, thus causing friction between him and Jones. When Frazer starts getting above himself, Mainwaring cancels the promotion.

The platoon is fire watching when the men see a man using a torch. Convinced that they have discovered a spy, they arrest him only to find that they have made a terrible mistake.

The platoon practices house clearing by using the office, unaware that the vicar and Hodges have got caught up in the action. Later during a live firing exercise the platoon is sent to the wrong map reference. When Jones discovers the mistake he drives to the rescue.

Mainwaring is under orders to be more co-operative with the ARP wardens; a task that's made very difficult by their newly appointed chief. Walker strikes a deal with Jones to make it easier for him to carry rationed goods without being stopped by the police - he is to let the platoon use his butcher's van as a troop carrier and ambulance by day and let Walker use it by night. He bribes Jones with the promise that Jones will receive petrol coupons for it. Unfortunately things don't go entirely to plan...

The platoon has moved to a new HQ's position on the beach. When Pike fails to turn up they find him caught up in the barbed wire at the waters edge. With the tide coming in, Mainwaring and Wilson mount a rescue mission, but someone else gets there first.

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.

Pike gets his head caught in the park railings and the platoon is summoned to help. Meanwhile a large bomb has exploded near the town and has put out the gas and water supplies. When Mainwaring returns to hear what has happened he puts the town under martial law.

After listening to a radio broadcast asking for men to form what has been named Local Defence Volunteers (later to be renamed the Home Guard), George Mainwaring, a local bank manager, decides to act and form the platoon of his own accord. He appoints himself as Captain and recruits his chief bank clerk Arthur Wilson as the platoon sergeant as well as enlisting the bank's office boy Frank Pike. Several of the local tradesmen - including James Frazer, a philatelist shopkeeper; retired shop worker Charles Godfrey; Jack Jones the butcher and black market businessman Joe Walker - also volunteer their service for 'King and Country.' And so, The Walmington-on-Sea LDV is born.

The platoon is given a heavy naval artillery piece but the town's bandstand, a rare example of Victorian ironwork, stands in its field of fire. The town council insists it must be preserved but Mainwaring reasons that a demonstration of the gun's capabilities will quiet any protests.

A German pilot has bailed out and is caught hanging by his parachute on the clock tower. The platoon climbs up to rescue him but after Jones breaks the ladder, it's the platoon that needs rescuing.

The platoon decides to give a party to the visiting American troops. When the Yanks start to get fresh with the platoon's girlfriends, all hell lets loose.

In Capt. Mainwaring's absence Wilson organises a darts match against the ARP in the local pub. When Mainwaring returns unexpectedly they have trouble getting the men back on parade.

Mainwaring watches a film reel at the cinema which shows Winston Churchill inspecting Army troops and their mascot - a ram, of course where Mainwaring's concerned. If another platoon has a mascot, so must his. Sponge volunteers one from his farm but they have to catch it first; something that of course ends in complete disaster with Pike up to his neck in it - literally. Meanwhile the town parade is being organised and of course Mainwaring wants the platoon to lead, but Hodges has other ideas...