4. Natalie Dormer
Her Companion: Finn Jones Brother to her Game of Thrones character Margaery, Finn Jones also plays the grandson of third Doctor companion Jo Grant so this could be a fairly interesting relationship. In Game of Thrones the brother and sister are closer than any other like Jo once was to the third Doctor. Her Master: Lena Headey Yes, I am right. Lena Heady as the Master would be awesome. She had the uncanny ability to seep evil from every pour of her body and still put in a brilliant performance. The two actresses bat horns most weeks in Game of Thrones and it seems that neither can quite get the upper hand. A very Master/ Doctor-like relationship. Power struggles are central to the characters that have made Natalie Dormer famous. Just watch her play the Game of Thrones, in Westeross or in the Court of King Henry VIII. You might be able to identify a surprising similarity between her and the Second Doctor. Each put on a false persona to manipulate those around them into doing what they want. She would make a very devious Doctor indeed...