Frank and Bobbins are asked to stake out a criminal's house. They set up camp in an old lady's flat with camera, binoculars and bugging equipment. They quickly become distracted and Bobbins becomes more interested in being the old lady's favourite while Frank is focused on trying to prove to MacBean that she's not shallow. They end up trashing the old lady's flat and cuffing their rivals MacBean and MacGregor in order to beat them to making an arrest. They return triumphant to the station, expecting congratulations – but there is a tiny detail they've overlooked.
