Battle of the Giants! - S4-E14
Visible crew/equipment: Early in this episode, when Mainwaring and Wilson are in the office, there is a knock on the door. Mainwaring tells Wilson to answer the door. As Wilson makes his way to the door, there is a shadow of the overhead mic on the wall behind him.
Don't Forget the Diver - S4-E2
Factual error: While Capt. Square is looking through his binoculars at what he thinks is Mainwaring's platoon marching with their rifles, a 1960's Bedford lorry drives past on the road behind them.
Other mistake: When the train stops Godfrey gets off to relieve himself but when he is climbing back in to the carriage the train appears to be already moving at speed because the background projection started moving too early.
Audio problem: Jonesy is playing the organ. A pigeon 'flies' out the top of the organ and lands on the keys, so Jonesy picks it up and moves it, taking both his hands off the keys. Yet the music plays on.
Continuity mistake: When the second bottle thrown by Pike lands on the floor, the glass from the first bottle has all disappeared.
Other mistake: Wilson picks up the empty tablet bottle, but we hear the tablets rattling inside. Wilson then says 'it's empty, sir.'
Continuity mistake: In War Dance (4-2) the verger Mr. Yateman's wife's Christian name is Anthea. In Everybody's Trucking (8-1) it is Beryl, and in Knights of Madness (10-3) she is called Tracy.
Battle of the Giants! - S4-E14
Factual error: When Mainwaring is driving the van and Jones is in the back suffering from malaria, just after Pike shouts out that Jones has changed colour, if you look out the side window you can see a triangular road sign. These did not come into use until the 1960s.
Come In, Your Time Is Up - S8-E4
Revealing mistake: In the very first scene Captain Mainwaring and Sergeant Wilson cast multiple shadows despite supposedly being in bright sunshine.
Battle of the Giants! - S4-E14
Visible crew/equipment: When Hodges tells Mainwaring to pull over when he is driving Jones' van you can see crew members reflected in the left hand side of the van's windscreen.
The Love of Three Oranges - S8-E8
Visible crew/equipment: At the end of the scene where Pike is setting up the stall selling the lampshades, a shadow of the boom mike can be seen on his forehead just before the scene changes to the auction.
Continuity mistake: The Verger Mr Yeatman's first name is Maurice, but in this episode it is Henry.
Revealing mistake: This actually happens throughout the entire show but is most obvious at the beginning of this episode: When they are in the churchyard it is obviously a studio stage, as there are shadows at all angles around the cast from the studio lights. Also, the lights are quite prominently reflected in Arthur Lowe's glasses.
The King Was in His Counting House - S5-E7
Factual error: Captain Mainwaring is transferring money from his bank to another branch after it has been bombed. He has the money in a basket and is transporting it on a horse and cart when some of the money starts blowing out of the basket. Pike, Wilson, Walker, and Jones are riding bicycles behind him. They stop to pick up the money and just before Jones tells Pike to ride after Mainwaring to tell him about the money, you can see a silver car parked on the left hand grass verge in the direction Mainwaring is heading. This car was obviously made long after World War Two finished.
Factual error: In several scenes during the cricket match while the Walmington platoon are bowling/fielding, cars can be seen on the road behind the cricket ground that were made well after the 1940s.
Revealing mistake: When Frazer is attempting to get the chocolate out of the crane machine, he tells Mainwaring to keep quiet. When he does this, he takes his hands of the machine, and it picks up the chocolate on its own, without anyone controlling it.
Is There Honey Still for Tea? - S8-E3
Character mistake: When Mainwaring and the others are discussing how to break the news to Godfrey about his cottage, it is mentioned that the roof is made of thatch. However when Mainwaring, Wilson and Pike go to visit Godfrey, the roof of his cottage can be seen and it is slate, with no thatch anywhere in sight.
Visible crew/equipment: When Pike returns to the arcade to tell the platoon that he has lost the boat you can see the shadow of the boom mike in Walkers face.
Visible crew/equipment: Bank scene: As Pike is handing the mail to Mr Mainwaring, a boom microphone is visible at the top of the screen for a second, and is quickly removed from view. (00:09:10)
Factual error: The motorbike and sidecar used by the verger is a post-war 1945 BSA M21 with sidecar. The period is supposed to be 1942.
Answer: The show is a comedy, this was played for comedic effect and to show that in times of extreme fear, in this case about to be crushed by a steam train, the men had an adrenaline surge strong enough to pedal fast enough.