I know we're gearing up to move on, but I can't help constantly thinking how cool it would have been if #TheMaster had ended up being the #TimelessChild. 🤔🤓 #DoctorWho

The first '[X] is really Susan' of the season was spotted in El Sandifer's Tumblr asks yesterday. The scary thing is that this time around, it could be correct. #DoctorWho #Timelesschild