The way all of this was coming together worried him and also got him very curious as a result. The Doctor wants to know just what kind of connection he had with the woman - River Song - in front of him. His mind throws together all sorts of possibilities of just how he met her, but he didn't come to a logical conclusion on the matter. What made her so special to him? Why didn't - or couldn't, rather - remember just what sort of relationship they had.

However, he forces himself out of those thoughts for now. He supposes that he could ask her later on when he managed to gather his bearings here on Stacy. Though, this problem was one of the ones that was high on his priority list, so it wasn't as if he was going to simply ignore it and move on with his life. The Doctor could give her that much for now, but he wants to try to help her out as much as possible. After all, that was what he had set forth to do from when he was still an old, graying man.

"It's okay," he says finally, giving her a little smile. He listens to what she said and nodded. He was glad to hear that the TARDIS was here, as well as his companions. But, what gives him pause was the future regeneration part.

"...I'm sorry? Did you say 'future regeneration'?" he asks, confused on the matter. Did something happen like when he met his fifth incarnate or no? Well, here was the time to get all the facts, so he waits for her to explain.