Doctor Who: 10 Most Compelling Series 9 Fan Theories
7. The Doctor's Granddaughter, Susan, Is Returning!
Game of Thrones star, Maisie Williams will be in the two-part season-opening story The Girl Who Died / The Woman Who Lived, but we don't know who she's playing. There have been plenty of rumours on this front, namely:
1. She's a new incarnation of Jenny, the Doctor's daughter from the story, um, The Doctor's Daughter.
2. She's the Doctor's granddaughter, Susan.
3. She's the Doctor's great-granddaughter, the daughter of Susan.
Fans want theory 1 to be true because Jenny was so much fun, but Jenny was great because of Georgia Moffett. Maisie Williams is also great; however, it just wouldn't be the same.
As far as the other two theories go, showrunner Steven Moffatt has denied that Williams is playing an established character. Now, Moffatt lies, of course, for our own good, so she could really be Susan. On the other hand, if she's Susan's daughter, Moffatt would technically have been telling the truth when he said Williams was playing an all-new character.
Let's mark this theory as "possible". At least we don't have long to wait to find out!