P. Harrison

Mr P Harrison was a non-canonical character who was created for the film adaptation of How Does Your Garden Grow? in Series 3 of ITV's Agatha Christie's Poirot. Harrison was the solicitor of Amelia Barrowby. After she had been murdered, Poirot needed to know the contents of her will. Harrison was reluctant to breach client confidentiality but Poirot argued that his silence only furthered the purposes of a murderer. At that time, Harrison was judging a pony show and he used the occasion to hint at the contents of the will to Poirot. He pointed to the horses in the competition. There were various breeds of horses, local breeds as well as foreign. It was the foreign breed which won the prize, implying that it was the Russian Katrina Rieger who stood to gain most from Amelia's will.

Harrison was played by John Burgess. This character does not occur in the the original story. In the original story, Inspector Sims told Poirot about the contents of Amelia's will.