The Doctor Who Christmas Special prequel entitled “The Great Detective” features a very grumpy Doctor. His old friends: Vastra, Strax, and Jenny summon him to help solve a mystery but he tells them to stop bothering him because he’s retired.

Steven Moffat, Lead Writer and Executive Producer, said: “The Doctor at Christmas is one of my favorite things – but this year it’s different. He’s lost Amy and Rory to the Weeping Angels, and he’s not in a good place: in fact, he’s Scrooge. He’s withdrawn from the world and no longer cares what happens to it. So when all of humanity hangs in the balance, can anyone persuade a tired and heartbroken Doctor that it’s time to return to the good fight. Enter Jenna-Louise Coleman…”

Coleman will co-star as the Doctor’s new companion, Clara. Of course, it’s not really her first appearance. In “Asylum of the Daleks,” she played Oswin Oswald. They address this apparent contradiction in the introduction to the Christmas Special trailer.

“You died and got turned into a Dalek,” says Matt Smith. “So you couldn’t be the same character at Christmas that would be just impossible.” Coleman confirms that it was a “totally different character.”

Her denials make me think the time lady doth protest to much. Another clue has surfaced supporting my theory not only is she Oswin but also that Clara is a regeneration of River. A commenter on the post pointed out that in Back to the Future, the time traveling scientist “Doc” is married to Clara Clayton, which suggests that the Doctor and Clara are married too.