Quote Originally Posted by ~*~Celes~*~ View Post
I can't wait to see how they explain the two big plot points that they brought up: Clara's telephone call to the TARDIS and Twelve's face. I loved this episode and I can't wait for more!
I don't think there's anything they need to explain about the phone call. It was just a way for Smith's Doctor to tell Clara that it'll be okay since she never witnessed a regeneration before, and he likely neglected to tell her given he thought it was his last.

As for the mention of the face, I think it was probably just acknowledging that Capaldi has been on the show before. Could be wrong, but it would explain why he recognizes his face.