Mary supports two charities related to animals: The Cat's Protection League and RSPCA. If she hadn't become an actress Mary would have liked being an inspector for the RSPCA.
Mary: (On working with Tom Baker on Doctor Who) I loved working with him. I do think he was the best Doctor and he brought such a lot of humour to it, which wasn't in the script. We would both do little tweaks with the lines and, as we got to know each other better, we put lots of little jokes in for ourselves.
Mary: (On the environment) I'm a bit of a green nut. I go to the supermarket with my own bags and it drives me mad seeing people grabbing for the plastic. I have even said in a loud voice, "I've brought my own bag." Some people look but I don't care. We have to fight for the environment.
Mary: (commenting on the new series of Doctor Who) I did watch some of the new series, but it's on at a time when I'm never at home, although I try to record it. I do think it's brilliant. I feel slightly envious because the production values are so wonderful.