Jack glanced around, then stepped away from the door and picked a wall to lean against. "I want to snap the Master's neck," he said, flatly. "Almost did, once. I regret not doing it more than you'd believe. You, on the other hand, I really would love to trust. Part of the reason I want to tear the Master apart with my teeth - most of the reason, as it unsurprisingly turns out - is what he did to the Doctor and how I see the Doctor. The combination's interesting and the questions are about me trying to work that out."