The Fugitive Doctor

The Fugitive Doctor was a big surprise, first appearing in "Fugitive of the Judoon," and then throwing off everything we thought we knew about the Doctor's past lives. In fairness, the Doctor didn't know either. She's appeared a few times since then, which is always a pleasant surprise. Big Finish is always happy to expand whenever they get the chance, and gave the Fugitive Doctor a few boxed sets of her own.