It’s wonderful – a whole other series of stories with the Doctor. I couldn’t walk away with the story being unresolved, there’s so much more to do and I think [Clara and the Doctor] have finally just reached a point where they really understand each other.

The arrival of the 12th Doctor has just dropped this bombshell and allowed the dynamic to totally, totally change so I think, just when Clara was feeling more comfortable in the relationship, it’s suddenly thrown something totally new up and I think the comeuppance of that and the story that we got to tell over the season has been thrilling.