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.

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.

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.