"Maybe you don't change then. But if that's the case, then I reckon you must have been pretty brilliant to begin with." The Doctor injected the shot, rubbing John's arm and monitoring him carefully. Alright, his heart rate was stabilizing, his pupils already less dilated. If this was working then maybe the cure he was working on would work as well. Here was hoping. He held John's hand in his as he kept feeling his pulse, glancing back over his shoulder to make sure the machine was still doing its work.

"When I first met Jack, way back when, I didn't take to him so much. I might have been a bit jealous. Ro... My travel companion at the time. She really took to him. He could be so many things I couldn't, especially at the time." The Doctor shrugged, breathing out in relief. John was looking quite a bit better. Good, he'd bought them some time. "Well. At least not as freely as him, anyway."