 The reception follows, and Mainwaring is surprised when Wilson turns up in his old uniform from the last war (having been forced to so by Mrs Pike who has hidden his trousers), revealing he was a captain.Wilson is then surprised when he learns he must toast the Matron-of-Honour, Mrs Pike.A much needed change of pace is welcome when everyone celebrated the goodness 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.