In the village of Ferne Basset, an elderly resident is found drowned after a violent attack. Meanwhile, at the Corn Exchange in Causton, a local amateur dramatic production of Amadeus reveals a backstage world of intrigue, passion and gossip — and a whole new meaning to the term “corpsing” when there is a second murder. Guest starring Bernard Hepton (Tinker, Tailor, Soldier, Spy).