Having just reread the book, I was very curious as to how this episode would translate to the "Poirot" series, which I am watching through from beginning to end for the first time. "Sad Cypress" is one of the lesser known of the Poirot canon, but I have always thought it a minor masterpiece. This adaptation does not disappoint. Some will be caught by surprise by the surprise ending, and granted, the novel drops far more clues, but I thought it was all elegantly done. I came to the end of the episode with a smile on my face, and a warm glow in my heart, which implies to me that the makers of this episode succeeded where it mattered most.