The Doctor nodded, immediately stepping over to the nearest control panel to dim the light. Not turning it off completely, he had science to do here. Jack. Of course John would think of Jack now. The Doctor pushed his glasses up so he could bend over and look through a microscope. "Jack, yeah. Well, I think he'd be rather astounded by a lot of things going on with you recently, don't you think? Defeating the Daleks. Playing Doctor. He probably wouldn't even believe it if we told him."

That said he started a machine, standing up to send another message to Jack. He looked at John, making sure he was still awake. "He does like you, you know? All those years he's lived and he still feels for you like that." He looked to the side, picking up a syringe and using it to extract some of the liquid he'd just created. "Stretch your arm out, John. This should at least stabilize your condition for now. Make it a bit more bearable again. I'm developing a cure, don't worry."