The ABC Murders

There is a code. The code is me.

On BBC One

A taut, psychologically intricate serial-killer mystery that frames an aging detective's final case as both a puzzle and a reckoning with obsolescence and mortality.

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.