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.
In a video for the new exclusive adventure at the Doctor Who Experience in Cardiff, Peter Capaldi's 12th Doctor not only climbs aboard several classic TARDIS designs, he also gets a message from one of The Doctor's classic companions, the Time Lady, Romana II (Lalla Ward).
Does this mean Romana is hanging out on a time-locked Gallifrey. Whovians can only hope!