aptain Square gets Mainwaring drunk in the officers' mess, damaging Mainwaring's reputation in the eyes of the platoon. Mainwaring must repair his image.

After the ARP headquarters is bombed, the platoon is forced to share the church hall with the wardens.

Mainwaring is shocked to discover that Wilson has been both made manager of the Eastgate branch of the bank and commissioned as Captain of the Eastgate platoon. Mainwaring is left with Pike as his chief clerk and Jones as his sergeant.

The ARP wardens challenge the Home Guard to a game of cricket. While Mainwaring is happy to play fairly, Hodges recruits Ernie Egan, a professional cricketeer.

Mainwaring allows women into his platoon but rumours begin to circulate that he has become personally involved with one of the new members.

A new platoon member who served with Jones during the Mahdist War accuses him of cowardice.

The platoon mans a local lighthouse as defence against a seaborne assault. During an air raid, the light is switched on and the town is illuminated.

In Mainwaring's absence, the platoon foregoes parade to compete in a darts match against the ARP wardens. Upon his return, Mainwaring orders Wilson to bring them back. With two pints for the winners, though, the platoon refuses to leave.

The platoon is sent to guard a camp full of Italian prisoners of war, but Walker's attitude toward them makes Mainwaring wonder if he is a fifth columnist.

Pike is caught in barbed wire in the middle of a mine field on the beach. The army engineers are slow to arrive so the platoon takes action to save him.

Mainwaring puts the platoon on a foot-toughening regime, including 20 miles (32 km) route marches and playing football in bare feet.

The platoon participate in a training exercise in which their goal is to detonate a bomb inside a mill occupied by the Eastgate Platoon. Jones wants to dress up as a tree and creep up to the front door too slowly for them to notice; Fraser acquires an ancient diving suit and plants to infiltrate by water. Meanwhile, the Eastgate Platoon has recruited the Verger as their spy.

The platoon joins the Spitfire Week parade, but has to compete with the Sea Scouts and the ARP wardens for pole position. Mainwaring thinks a mascot will help their chances.