Louise: (Naming the reasons why she left Doctor Who) I'd been offered Portia in The Merchant of Venice at the Bristol Old Vic. That was the biggest carrot. I was also shortlisted for a movie, which didn't happen, which was Yanks. I felt that careerwise, Doctor Who had done about as much it could do. And, as I say, I was rather depressed with saying 'what is it Doctor?'.