"Right, Jack. This should last you." The Doctor let go of Jack's wrist, considering the screwdriver for a few seconds before putting it away. He flashed Jack a smile, turning the same expression to Koschei. "Almost there... Where did you leave your tie?" He frowned and waved it off. "Never mind, we'll find it." It was there and then he decided that he'd better take Koschei by the hand. The Master might have wandered off to plan his next genocide, but Koschei? Why, Koschei was just as likely to lose his path because he saw something shiny nearby.

"Oh, Jack." That smile was for him again. "Would you like a key?"