Doctor Who showrunner Steven Moffat reckons that Jenna-Louise Coleman arrival as the new companion on Doctor Who will have a major impact on the show.
Speaking on Radio 5 to Richard Bacon, he said, “It's just very exciting. When a new companion comes in it sort of reboots the show a little bit, it makes you look at the Doctor differently, it makes the show feel different, that's already happening. It's literally a new beginning, you're back to chapter one, in a way it's always a story of someone getting to know the Doctor, and now it's Jenna's character. There's a lot of ways (her character) will be different, but I'm not telling you what they are! Jenna is just wonderful and spiky and salty and clever: again - just as Doctor Who always does - it becomes a different show, and I'm thrilled with her, everyone's going to be.” [via Doctor Who News ]
Coleman has actually started work on her first episode, but it's not the one she’ll first appear in on screen. Instead she been filming one of the episode due to air in 2013, after the Christmas special in which she’ll make her debut (Moffat’s still writing that, apparently). Locations filmed thus far have included the Manor House at Plas Llanmihangel, Margam Country Park and Gethin Woodland Park. [also via Doctor Who News ]