Three episodes of the Scottish detective series. In 'Knife Edge', body parts are turning up all over Glasgow, drawing Taggart (Mark McManus) and his team into a complicated web of intrigue. In 'Flesh and Blood', the team are under pressure to solve a puzzling case after a role-playing game spills over into real life with devastating results. 'Nest of Vipers' sees the discovery of two skulls at the site of a new bypass, bringing the team once again to the forefront of the seedy underworld of the city. This time, however, it's personal for Taggart.