Although what confuses me is why River Song was so worried about him using up his regeneration energy. She got all upset when he used it to heal her arm in the last story with the Ponds.
So I dunno I think there's still something afoot - either River's worrying about something she really doesn't or something's going to come from this Clara arc that he's going to need every bit of regen juice he's got to stay alive.
So I dunno I think there's still something afoot - either River's worrying about something she really doesn't or something's going to come from this Clara arc that he's going to need every bit of regen juice he's got to stay alive.