"Spent a lot of time during the war trying to drag him down to my level. Telling him he couldn't possibly be any kind of good and do the things we did. He started to believe me. At Arcadia. I think he decided he'd rather die then believe he could stop caring." He let out a bitter laugh, and quoted Jack. "'Die like a man, or live a Dalek.' As soon as I realized that I'd probably helped push him to that point. There wasn't anything I wanted more then to fix what I'd done. Whatever it took. Fixing me. Fixing him."