- A mathematician and author, Luke Williams, is travelling up to London on a train when he meets a old lady, Lavinia Fullerton, who is also going to London, to Scotland Yard. Lavinia tells Luke that in her small village several people have died. The local police are certain that it was all accidental and are taking no ac…
- Leeds police constable Jo Gillespie (Sheridan Smith) is devastated when her husband, undercover officer Ryan (Kenny Doughty), is killed in suspicious circumstances. As she battles to stay strong for the benefit of daughter Melly (Honor Kneafsey) and stepson Hal (Oliver Woollford), Jo is urged by her bosses, DCI Will He…