"Because I can," he said, fraught with the panic of the moment and how critical it was to get to the information he needed before it was too late. "If I stop her, if I call Kayla back right now and have her come back, I'll find the ulcers and I'll stop them from rupturing and she won't need a liver and she won't get Hep C or cancer or..." He took in a sharp breath, staring at the Doctor hopelessly. "I have to try."