A wedding between Lance Corporal Jones and Mrs Fox is announced and takes place, but the reception is interrupted as the platoon are put on full invasion alert.
Mrs Fox stops by the church hall in search of Jones, but she is met by Godfrey, who tells her that the rest of the platoon has gone for a march and will not be back for some time.
The reception follows, and Mainwaring is surprised when Wilson turns up in his uniform from the First World War (having been forced to do so by Mrs Pike who has hidden his trousers), revealing he was a captain.
A much-needed change of pace is welcome when everyone celebrated the happiness of the wedding, but it is drastically cut short when the Colonel informs Mainwaring of an invasion alert and thinks it may not be a bluff.
After Hodges leaves, Mainwaring, Wilson, Jones, Fraser, Pike and Godfrey all agree that "no-one is getting past them" and that there are "hundreds of men just like them" who are willing to fight for their freedom.
[1] In a 2000 interview with writer/historian Graham McCann, series co-writer David Croft recalled that final day of filming "was a very emotional evening.
He went on to write: 'It is bound to be remembered for sentiment and nostalgia, and it's made the most of those, but that makes it all the more necessary to record, as the absolutely final credits roll, that it has given us finer farces, straighter faces, richer characterisation, and a deal more social observation, than most of the most pretentious dramas, and always kept us guessing which would turn up next.