Hearing the church bells ring (which is the signal indicating the start of a German invasion), Mainwaring, Jones and Frazer go to Godfrey's cottage to defend an important crossroads nearby. Wilson, Pike and Walker also hear the bells and take up positions in the summerhouse. Both groups mistake the other group for Germans. (This should not be confused with the
Dad's Army (1971 film) where workmen arrive at the church to take away its bells to be melted down into weapons. The Vicar decides to give them one last ring, which is mistaken for an invasion alert and causes the platoon to barricade the main road). ==Plot==