Frazer points out that the parachutist may be miles away by the time they find the parachute, so Walker decides to bring a tracker dog to the next parade.
The people they have questioned complain to ARP Warden Hodges, who leaves Mainwaring in a tough situation when a pair of knickers emerges from a letterbox.
As they head up the church hall stairs, Mrs Pike arrives to remind Wilson about their tête-a-tête supper.
They follow him to a barn containing a Pekingese dog, a building that was bombed in an air raid the previous year and into a dilapidated old house, where they confront him.
However, it turns out he is a Viennese ornithologist, having found a golden oriole bird's egg (which the platoon initially mistakes for a grenade).
The hunt for the parachutist is omitted and there is an additional scene, adapted from another TV episode, Uninvited Guests, in which the platoon trains to use wireless sets using tins and string.