Irene Mullen

Irene Mullen was a non-canonical character who was created for the film adaptation of Four and Twenty Blackbirds in Season 1 of ITV's Agatha Christie's Poirot. Together with some neighbours, Irene discovered the body of Henry Gascoigne. She was one of the witnesses interviewed by Hercule Poirot when investigating the death of Henry Gascoigne. She told Poirot and Hastings that on the Saturday of Henry's death, he had passed her without even greeting her, as though he did not recognise her. Irene Mullen was probably Henry's landlady as she had a key and let Poirot and Hastings into Henry's house.

Irene Mullen was played in the film by Marjie Lawrence. This character does not occur in the original story.