(bright music) - My name is Samantha Bond, and I play Judith Potts in "The Marlow Murder Club."

Judith is a retired archeologist.

She's very happy in her own company.

She has a wonderful cat.

Judith likes to work things out very logically, very precisely.

She strives for the truth, and she knows at the first incident it hasn't been investigated properly.

I know what I heard.

That's where her archeological background comes in.

She tries to piece the things very logically together.

Judith Potts.

- Suzie Harris.

- I'm Jo Martin.

I play Suzie Harris.

Dog Walker, single mum, looking to live some life.

She's busy.

You know, she's climbing through windows.

She's running to save people.

She's always on the go.

I think Suzie's a bit lonely.

I think if truth be known, Judith is also, and Becks feels very othered and alone.

- My name's Cara Horgan, and I play Becks Starling in "The Marlow Murder Club."

She is a mother.

She's married to the vicar, so she's very much at the epicenter of the community.

And we meet her in the story at a time when she's definitely unsatisfied and needs new challenges and new things.

When the crime start to unfold and she meets Judith.

- What do you think?

- What do I think?

It starts to reignite that side of her character, which is kind of curious, and interested, and also very capable.

She finds she's more satisfied doing that than she was just being a wife.

We are not going to stop investigating, are we?

- My name's Natalie Dew, and I play Tanika Malik.

She is the detective sergeant in charge of the case in Marlow.

The police haven't had to deal with a murder like this before.

There is this thing of having to prove yourself, and predominantly in quite a male environment as well.

- Not to worry, our civilian advisors will come to the rescue.

- They all bring something different to the table, I think, and that's why I think as a three, as a trio, they work really well 'cause they've got different strengths.

- Up top.

- We meet someone who's very self-sufficient and used to doing her own thing.

She doesn't really need other people, she's closed herself off.

It's really nice to see her almost surprise herself as she gets drawn into the investigation and sort of picks up Suzie and picks up Becks.

- Like they're all so different with each other and have very, very different opinions.

- When we all come together, we find all this common ground and sisterhood.

We're not gonna miss this, are we?

- It's been an amazing company of actors.

I think the big thing that's really very helpful is that we all have a monumental sense of humor.

- And we all like wine.

(all laughing)