1933. Hercule Poirot, older and greyer, receives letters threatening murder. The sender signs themselves only as “A.B.C.” When he takes the letters to the police looking for help, Hercule finds all his old friends have moved on. But soon there is a murder and the once-great detective must take matters into his own hands.
John Malkovich
as Hercule Poirot
Rupert Grint
as Inspector Crome
Eamon Farren
as Cust
Andrew Buchan
as Franklin Clarke
Bronwyn James
as Megan Barnard
Tara Fitzgerald
as Lady Hermoine Clarke
Anya Chalotra
as Lily Marbury
Freya Mavor
as Thora Grey
Conrad McCroddan
as Beautiful Young Man
Eve Austin
as Betty Barnard
Suzanne Packer
as Capstick
Jack Farthing
as Donald Fraser
Episode 1
Episode 2
Episode 3
