The A.B.C. killer sends Hercule more ominous letters promising to spill blood. Hercule's past, integrity, authority and identity all come into question while he fights the atmosphere of rising xenophobia in Britain.
Crime • Drama
More episodes from Season 1
More details
Creators
Sarah Phelps, Agatha Christie
Directors
Alex Gabassi
Cast
John Malkovich, Rupert Grint, Andrew Buchan, Eamon Farren, Tara Fitzgerald, Shirley Henderson, Freya Mavor, Jack Farthing, Bronwyn James, Anya Chalotra, Michael Shaeffer