The ABC Murders is a mystery thriller TV series based on Agatha Christie's 1936 novel of the same name. Hercule Poirot has retired, he is receiving letters signed only as ABC from a killer. Hercule must decode them to identify and find the perpetrator. He takes the letters to Scotland Yard, looking for help from his old friends, but discovers they are no longer there. He has nothing left but solve the case himself. Director: Alex Gabassi. Actors: John Malkovich (Hercule Poirot), Eamon Farren (Cust), Shirley Henderson (Rose Marbury), Michael Shaeffer (Sergeant Yelland), Rupert Grint (Inspector Crome) (2018)