SunSwirls
I'm sure all of you have noticed that Peter Capaldi and Karen Gillan, better known in the Whovian fandom as the Twelfth Doctor and Amy, are in a Tenth Doctor episode: the Fires of Pompeii.
Have you ever wondered why?
Well, here's your answer.
DISCLAIMER: I do not own Doctor Who, and I'm fully aware that the real reason is because BBC "recycles" actors. I just thought that this would be a fun spin on it ^^
Also aware that they explain the Twelfth Doctor thing in season nine (this is what I get for clicking a link containing spoilers /).-), but I haven't seen it yet, so deal with it, k? K.