The ABC Murders S1, E3

In 1933, retired detective Hercule Poirot is targeted by a taunting killer who sends letters signed "ABC", which Poirot must decode in order to discover the identity of the murderer.

Cast:John Malkovich , Eamon Farren , Michael Shaeffer , Rupert Grint , Conrad McCroddan , Freya Mavor , Shirley Henderson , Anya Chalotra , Andrew Buchan , Tara Fitzgerald , Bronwyn James , Christopher Villiers , Jack Farthing , Suzanne Packer , Eve Austin , Tamzin Griffin , Lizzy McInnerny , Terenia Edwards