"Sgt – Save My Boy!" is the fourth episode of the fourth series of the British comedy series Dad's Army. It was originally transmitted on Friday 16 October 1970. Synopsis During a blackout, Pike manages to get himself tangled up on barbed wire on the mined beach. As the tide begins to come in, the platoon undertakes a rescue operation. Plot Mainwaring is giving a lecture on the progress of the war. He remarks that the Dunkirk evacuation meant that the orphans in the Harris Orphans' Holiday Home Hut on the coast had to leave as well, leaving the hut free for them to use as a patrol hut. They are quick to set up their equipment and now only have to wait for Private Pike with a flask of tea. Eventually, Mrs Pike arrives at the hut with a tin of biscuits that Frank left at home, and is shocked when she learns that her son has yet to arrive, particularly as he left ten minutes before she did. She worries that he's been targeted by the Walmington prowler; Walker remarks that he may be the prowler. As they worry, Frazer, who's on guard duty, hears a cry for help outside. The platoon and Mrs Pike rush outside and see Frank tangled up in the barbed wire which runs along the beach. Walker assumes that Frank must have gotten lost and tried to get through a cut-in gap in the wire used for bathers. What is worse, the beach is a minefield. Mainwaring tells Wilson to ring the engineers – but they're dealing with another emergency and won't be able to get there for another three hours, which will be too late because the tide is coming in. Walker suggests taking a boat, but Frazer squashes this idea by saying it would take too long to get there from the nearest dock, and that Pike would have drowned by the time they got back. With no alternative, they decide to negotiate a path through the minefield. Frazer has seen the mines laid, so he outlines the pattern to Mainwaring. Jones' section, save Godfrey who has mysteriously vanished, prod their way down the beach with Jones's bayonet. On their travels, they discover a book on 'How to Lay a Mine Field', and a suspicious object with '' written on it. However, when turned the right way up, Walker discovers that