Click To Help Joker!
The Joker believes this article is lacking a certain flair -

namely some good quality images.. you could just leave the article without pictures but really now.. where's the fun in that?'
Stop hand

Franklin Clarke is the main antagonist of The ABC Murders of Agatha
Franklin Clarke
Christie's Hercule Poriot novels. He is a serial killer known as the A.B.C. Killer. In the corresponding episode adaptation in the TV show, Agatha Christie's Poirot, Franklin was portrayed by Donald Douglas, and in the 2018 BBC miniseries, he was portrayed by Andrew Buchan.

Plot of The ABC Murders

After a meeting with the third victim's widow, Lady Clarke, Poirot realises one commonality at each of the three murders: a man selling silk stockings appeared the day of the murder. He sold a pair to Mrs. Ascher and to Mrs. Barnard, while being sent away from the Clarke home. A.B.C. sends his next letter, directing everybody to Doncaster. As the St. Leger horse race will take place that day, Poirot hopes to find him on the race course. But A. B. C. strikes in a cinema hall instead, killing George Earlsfield, instead of Roger Emmanuel Downes, a logical victim sitting only two seats away. However, Cust, about whom neither the Legion nor Poirot knows, slips out of the cinema hall unnoticed, after suffering a blackout. Cust, who has no idea of the happenings, finds the murder weapon in his pocket, blood on his sleeve, and realises the implications.

Tom Hartigan tips off Crome, while Lily tips off Cust, who tries to flee, but collapses at the Andover police station. When taken into custody, he believes he must be guilty. The search of his rooms finds silk stockings, lists of clients, the fine paper of A.B.C.'s letters to Poirot, an unopened box of ABC railway guides, and in the hall, the still-bloody knife used in the last murder. The police find that Cust was never hired by the stocking firm and the letters were typed on the typewriter he claims was given to him by the firm. Poirot meets Cust, but doubts his guilt after hearing Cust's full story; Cust has a solid alibi for the Bexhill murder and has no memory of any murder. Poirot calls a Legion meeting. He categorically proves that Cust is not the murderer. Early on, in discussing the Churston letter, Hastings remarked that the letter was meant to go astray. Poirot realises this simple solution is the correct one. The murderer wanted no chance of the police interrupting that murder. Poirot reveals that A.B.C. is in fact Franklin Clarke.

Franklin feared that after Lady Clarke's imminent death, Carmichael would marry Thora Grey. This would mean that the estate which Franklin stood to gain would go to Thora and any children she might have with Carmichael. Franklin decided to kill his brother while Lady Clarke is alive and make it look like a serial killing to throw off suspicion. Franklin met Cust in a chance encounter in a bar, thus giving him the idea of A.B.C. He planned and executed everything so that Cust would be framed, having served as his stalking horse.

Franklin laughs off Poirot's claims, but panics when Poirot states that his fingerprint was found on Cust's typewriter key, and that Franklin had been recognised by Milly Higley in the company of Betty Barnard, the second victim. Franklin tries to shoot himself using his gun, but Poirot has already had the gun emptied with help of a pickpocket. The police take him. With the case finally solved, Poirot pairs off Megan and Donald. Poirot tells Cust to demand a higher price from the press for his story and suggests that Cust's headaches may arise from his spectacles. Poirot tells Hastings that the fingerprint on the typewriter was a bluff. Poirot is pleased that he and Hastings had another experience together: "we went hunting once more".


  • Alice Ascher (in Andover)
  • Betty Barnard (in Bexhill)
  • Sir Carmichael Clarke (in Churston)
  • George Earlsfield (in Doncaster)


  • Alexander Bonaparte Cust



Agatha Christie's Poirot (title card) Villains

Alfred Inglethorp | Evelyn Howard | Marthe Daubreuil | Jane Wilkinson | Claude Darrell | Lanfranco Cassetti | Sir Charles Cartwright | Norman Gale | Dr. Geoffrey Roberts | Franklin Clarke | Bella Tanios | Nurse Harris | Jacqueline de Bellefort | Simon Doyle | Lady Westholme | Superintendent Sugden | Jessie Hopkins | Martin Alistair Blunt | Patrick Redfern | Elsa Greer | Miss Gilchrist | Marrascaud | Nigel Chapman | Ann Shapland | Gerda Christow | Dr. James Sheppard | Rowena Drake | Nick Buckley | Michael Garfield | Stephen Norton

Villainous Victims
Grace Springer | Mrs. Clapperton | Henry Reedburn | Harrington Pace | Sir Reuben Astwell | Paul Renauld | Lanfranco Cassetti | Linnet Doyle | Louise Bourget | Simeon Lee | Lady Boynton | Leslie Ferrier | Paul Déroulard | Mary Gerard | Lord Edgware | Madame Giselle | Stephen Norton

Alice Cunningham | Countess Vera Rosakoff | The Big Four | Anne Meredith | Miss Van Schuyler

TV Series Only
Rohda Dawes | David Hunter | Dr. Gerard

Community content is available under CC-BY-SA unless otherwise noted.