I've been curious about a number of things, mostly those related to Sodder, Cynthia, and Mother Superior. Others have mentioned meeting the Mayor and his form, and Cynthia I met not long ago, but it still feels as if there is a lot that I don't know yet. As for unexpected companions, outside of those from home there's is really only you and the Doctor.

He knows by the way, as a guardian of time as well he was rather quick to find out.