(gentle music) - It's completely unique in British television.

By the time this goes out, it will be 11, 12 years that we've been working together, and making this show together.

And it's a unique experiment, and a successful one, because the show continues to do extremely well.

We respect each other immensely, and I think it's just a fantastic working relationship now.

- Come on!

- Chris is such a brilliant writer, so clever.

- The script's complex.

He has empathy at the heart of his writing.

- So I start with a theme.

And then into that theme, I start introducing characters that I think could help me express that theme in multiple ways, interesting ways, but all connected to the theme.

- Every season has kind of run parallel to what the society is facing, and the issues that it needs to speak about.

- The thing I love about "Unforgotten" is it is so character-driven.

It's a really, really deep dive into four, five, six different characters.

I'd like you to leave.

- Super job!

Well done.

- Andy Wilson, our director, is brilliant.

He's directed every single episode.

- 36 hours of "Unforgotten," and so he knows the world as well as anybody else.

- Andy is an actor's director.

- He's sort of got a way of helping you get into that head space and into that world.

It's, that is marvelous.

- Well, you rarely get the privilege of being able to make as many series as this.

And you never get the privilege of doing it with the same people.

- Such a brilliant team, such a brilliant crew.

You know, everybody is so lovely and so welcoming.

Andy's created a set that is fun to be on.

- You wouldn't think it being on such a serious drama, but there has been so much laughter and joy.

It's been everything for me.

- I mean, I've had a theater company for seven years with the same actors, and this is the closest to that wonderful experience that I've ever had making film and television.

(gentle music)