The Belgian detective Hercule Poirot investigates a series of murders in London in which the victims are killed according to their initials.

Hercule Poirot

Amanda Beatrice Cross

Captain Hastings

Inspector Japp

Dr. Duncan Doncaster

Franklin

Don Fortune

Mister X

Sir Carmichael Clarke

Wolf

Sergeant

Cracknell

Judson

Miss Sparks

Dragbot

Mrs. Fortune

Bowling Alley Attendant (uncredited)
December 26, 1965

Hercule Poirot

Amanda Beatrice Cross

Captain Hastings

Inspector Japp

Dr. Duncan Doncaster

Franklin

Don Fortune

Mister X

Sir Carmichael Clarke

Wolf

Sergeant

Cracknell

Judson

Miss Sparks

Dragbot

Mrs. Fortune

Bowling Alley Attendant (uncredited)
