Captain Mainwaring recently sent a letter to GHQ requesting if they could use the local lighthouse as a guard house, and has just received permission to do so. Jones' section are the first to test this new guard house and prepare to move off that same evening. Walker can't attend because he's delivering some essential supplies, but the Lewis Gun has been fixed, no questions asked.
They arrive at the lighthouse and set themselves up. They have been asked to stand guard from 8:00 in the evening to 2:00 in the morning, much to Godfrey's disappointment. He is suddenly taken short and has to go downstairs, as the nearest convenience is right at the bottom. Frazer remarks that by the time he's got back up again, he'll have to start back down again!
Jones asks Frazer to check on Godfrey, but he refuses. He tells the story of his school friend Wally Reagan... He had been asked to watch over a lighthouse and, one night, he heard a slithering and a moaning from downstairs. He had gone downstairs to investigate, but had been scared back up because the slithery thing was following him up the stairs. He locked the door, but the slithery thing was trying to get in... Suddenly they hear a knocking on the door, and scream. But it's only Godfrey!
They try the telephone, but they've been cut off. Frazer panics, and Pike reckons it's the slithery thing coming to get them. Jones takes control, and pulls a switch. Suddenly, they hear a large moaning sound, and they realise they've turned the fog horn on! They attempt to turn it off, hoping there isn't an air raid that evening; just as the air raid siren blares!
It is Wilson and Hodges who discover the light, and inform Mainwaring and Mr Alberts, another ARP Warden, respectively. They discuss how to put it out, and Mainwaring suggest rowing out there. Mr Alberts says they'll be dashed to pieces on the rocks, but Mainwaring doesn't care. Mr Alberts then comments that there's no boat in the first place. Walker arrives with the Lewis Gun, and Hodges suggests shooting it out, but Mainwaring says it will kill the men in the lighthouse.
They decide to put the transformer out of action via the fuses, but only succeed in fusing the whole of the Jolly Roger Pier, but not the lighthouse! A disgruntled lighthouse keeper appears and informs them that it's powered by its own generator. As the telephone line to the lighthouse is cut off, Mainwaring tries to ring the telephone exchange to try and get it reconnected, but struggles to make himself plain to the lady at the exchange.
Walker talks to her and asks her to reconnect the line. Mainwaring rings Jones, and tells him to go down to the generator room and turn off the lighthouse from there. However, they are taking a long time about it, and Hodges eventually persuades Mainwaring to shoot it with the Lewis Gun.
However, just as Mainwaring is about to fire, the generator is shut down just in time. Hodges remarks that they haven't heard the last of this, and Wilson adds that they'll all be a lot poorer once GHQ learns about it!
|Arthur Lowe||Captain Mainwaring|
|John Le Mesurier||Sergeant Wilson|
|Clive Dunn||Lance Corporal Jones|
|John Laurie||Private Frazer|
|James Beck||Private Walker|
|Arnold Ridley||Private Godfrey|
|Ian Lavender||Private Pike|
|Bill Pertwee||ARP Warden Hodges|
|Stuart Sherwin||Mr Alberts, |
the 2nd ARP Warden
|Gordon Peters||Lighthouse Keeper|
|Avril Angers||Freda, |
the Telephone Operator