Sarah Sutton

Doctor Who is like any long-running series in that the cast tend to look to the star to set the general tone. Rehearsals and filming could be a lot of fun.

What you don't see backstage is what really controls the show.

After two years of doing one show, you do get attached to everyone.

There are so many ways to do research - even watching old Ealing comedies, watching people getting on and off buses in London, looking at household interiors.

I love Hindi films.

I'm a big action junkie. I grew up on the '80s action movies - the bad ones and the good ones.