Which British TV series features Mark Williams as the eponymous crime-solving Roman Catholic priest?

"Father Brown" is a British television detective period drama which began airing on BBC One on 14 January 2013. It features Mark Williams as the eponymous crime-solving Roman Catholic priest. The series is loosely based on short stories by G. K. Chesterton. Apart from soap operas, it is the third-longest-running daytime drama series on BBC TV, after Doctors and Moving On.

Father Brown uses the distinctive skills of his close friends as well as his own wits to solve cases, occasionally to the neglect of his more mundane parish duties. His vocation as a priest often gives him an insight to the truth, so that justice (but sometimes, not the letter of the law) may be served. His commitment to obeying the Seal of the Confessional often presents unique circumstances. The time period is when Britain was still struggling with deprivations and other hardships in the aftermath of the Second World War. At that time the country still applied the death penalty as a sentence for capital crimes such as murder. Father Brown opposes capital punishment.