Frederick Bosner/Eric Leidner in “Unfinished Business”

[after being exposed as the murderer] I am so tired. I'm sorry about Anne Johnson. That was bad, senseless. It wasn't me. It was fear on my part. You'd have made a good archaeologist, Mr. Poirot. You have the gift of recreating the past. I loved Louise, and I killed her. [to Richard] But you shan't have her, Carey! You betrayed me. You betrayed both of us. [to Poirot] Oh, if you'd known Louise, you'd have understood. No, I think you understand anyway.