A ragtag group of Home Guard volunteers prepare for an imminent German invasion during World War II.
Cast:Arthur Lowe , John Le Mesurier , Clive Dunn , John Laurie , Arnold Ridley , Ian Lavender , James Beck , Bill Pertwee , Edward Sinclair , Colin Bean , Frank Williams , Janet Davies , Robert Raglan , Pamela Cundell , Harold Bennett , Olive Mercer , Eric Longworth , Geoffrey Lumsden
Jones' butcher van is converted into an armoured car for the platoon.
The Platoon spend the weekend at a training facility, where they are challenged to capture an officer.
Mainwaring discovers his men do not know how to use a public telephone, a key part of his new defensive plan, when a German plane crash lands near Walmington.
The platoon fires off (almost) all its ammunition at an enemy plane and Mainwaring insists on doing what he sees is the right thing.
Mainwaring and Wilson are trapped in the bank with an unexploded bomb.
Mainwaring discovers that he was never actually promoted to Captain, and must adjust to life at his correct rank: Private.
A field gun is delivered to the platoon; can they work out how to use it?
Mainwaring's men practice saluting and take control of a runaway barrage balloon.
The platoon holds a dance providing a variety of opportunities for dysfunctional social intercourse.
Mainwaring and his platoon get into a pickle when they're put in charge manning an observation post on a derelict pier.
It is revealed that Private Godfrey was a Conscientious Objector in the First World War, leading Mainwaring and some of the platoon to brand him as a coward. However, during an exercise in which Mainwaring collapses with smoke inhalation, it is Godfrey who, at risk to himself, rescues him. When Mainwaring and the others go to visit Godfrey, recovering in bed, they see a photo of him with a military medal, won in the First World War when he was a brave stretcher bearer who saved many lives. Mainwaring is ashamed and asks Godfrey to be the platoon's official First Aid representative.
Mainwaring and the platoon are off on the hunt for British and German parachutes, parachutists, and the 'lingerie' made from them.
Pte. Fraser loses the butterfly spring from the platoon's Lewis gun, and fears it is trapped inside a coffin with the late Mr. Blewitt.
The platoon buys a canoe, and intends to create a river-based defense system, but get lost and drift into the ocean.