Emilia Fox has explained why she thinks her long-running hit BBC1 crime drama Silent Witness has such enduring appeal.

“They’re just really great stories, and we take the characters into different world, so viewers are finding out about that whole different world,” says Emilia, who’s played forensic pathologist Dr Nikki Alexander in Silent Witness since 2004, when her character replaced Amanda Burton’s Helen West.

“In this latest series, one episode was set on the London Underground, which we’d never done before in Silent Witness in all my 10 years of being there. You also get thrillers, and truthful topical episodes, so I think there’s a real mix in it for everyone. The format of the show worked very well this year, too, as the story was told over two days, so you didn’t have to wait a long time for the resolution.”

Emilia also told us that she’d been watching her younger brother Freddie Fox in C4 drama Cucumber. “I’m just so proud of him,” she said. “The whole show has been great, and I know he’s proud of it too.”

Emilia seemed slightly uneasy about Freddie’s raunchy scenes in Cucumber. “Oh yes, we’ve talked about it a lot!”