I started by collecting copies of all the novels and short stories featuring him and piled them up beside my bed. I wanted to get to the very heart of what Dame Agatha thought of him and what he was really like, and to do that, I had to read every word his creator had ever written about him. I didn’t want my Poirot to be a caricature, something made up in a film or television studio, I wanted him to be real, as real as he was in the books, as real as I could possibly make him. The first thing I realised was that I was a slightly too young to play him. He was a retired police detective in his sixties when he first appeared in The Mysterious Affair at Styles, while I was in my early forties. Not only that, he was also described as a good deal fatter than I was. There was going to have to be some considerable padding, not to mention very careful make-up and costume, if I was going to convince the world that I was the great Hercule Poirot. Even more important, the more I read about him, the more convinced I became that he was a character that demanded to be taken seriously. He wasn’t a silly little man with a funny accent, any more than Sherlock Holmes was just a morphine addict with a taste for playing the violin. There was a depth and quality to the Poirot that Dame Agatha had created – and that was what I desperately wanted to bring to the screen.