Endeavour, demoted to "general duty," meets his intellectual – and cultural – match in a new kind of serial killer haunting the Oxford twilight with cryptic clues and a disturbing love of opera.

Watch a preview of Endeavour Season 1, Episode 2 (Fugue), starring Shaun Evans, as seen on MASTERPIECE on PBS. Sign up to get the latest news on your favorite dramas and mysteries, as well as ...