Jack didn't want to be too much of a burden, and he could already feel the waves of dejection coming from Koschei. Jack crossed over to the Doctor and held out his wrist with the vortex manipulator. "You know you can contact me on it too, right?" he said with a very insistent look. "If you need me for any reason, I want to know about it, all right? I might not be as clever as you lot, but you two can't throw a punch for a damn."

Then, a thought occurred to him. Koschei seemed very much to be interested in Jack, and practically brimming with questions. "Koschei. You... don't notice anything odd about me?"