There's another Time Lord roaming about the ponyverse, but he has dark, ulterior motives for the hapless residents of this pleasant little world. Can Doctor Whooves defend Equestria from this great evil? Tune in next week and find out.
Another pic I've been working on. I've seen Cyber Ponies and Daleks, so I thought I'd throw this into the loop.
Reference pic is link
Background was found on Google image search and touched up.
MLP is (C) Hasbro
The Master is (C) the BBC.