Sorcha Cusack, Mark Williams, and Emer Kenny star on the ‘The Crimson Feather’ episode of the detective period drama television series, ‘Father Brown.’ It can often take wits, distinctive detective skills and divine intervention to solve cases. That’s especially true for the title character on the British detective period drama series, ‘Father Brown.’ The show features Mark Williams as the eponymous character, and is loosely based on a series of short stories by G. K. Chesterton. Having debuted in 2013, with a ninth series set to premiere next year, ‘Father Brown’ is the third-longest-running daytime drama series on BBC TV.