Godfrey's cottage is to be demolished to make way for an aerodrome until Frazer steps in.
Captain Mainwaring sets up an observation post in the lighthouse.
The platoon help a widowed lady friend of Private Godfrey to gather in the harvest.
The platoon is chosen for special duties during the testing of a secret weapon.
Melvyn visits the site of the first Home Guard training school in Osterley.
Can a team from comedy series Hi-De-Hi triumph over the general knowledge Goliaths?