Speculation continues as to who Maisie Williams will be playing in her two-episode guest stint in Doctor Who. In fact Steven Moffat coyly says that he can reveal "very little" about Williams's guest role at this time. "There's a load of things about why we cast her and why she's the right choice, and why she's amazing," Moffat teases. "I can only talk about them once you've seen the show." While Peter Capaldi adds, "I don't really want to give away too much about what she does, but what I will say is that she's quite cosmic. She's not quite what she seems."
