It's unconfirmed, but it appears that Jenna Coleman will be leaving Doctor Who in the Christmas Special later this year. If it's true, Clara Oswald's total time with The Doctor will end after one and a half seasons, and three specials. This will make her the third longest companion in New Who, just behind Amy Pond and Rose Tyler.
These behind the scenes pictures from the set from Doctor Who Series 8, show Jenna preparing for a scene in an outfit that looks like something The Doctor would wear, much different from her typical costume: a plaid or floral skirt. What's going on in this episode?