Keeley Hawes (Zoe Reynolds)

Keeley Hawes (Zoe Reynolds)

The second original team member, Zoe’s spy credentials are impeccable. But she is deeply troubled by Tom’s apparent treachery.

“Tom’s behaviour has a big impact on Zoe,” says Keeley Hawes. “She thinks the worst of him, she’s completely convinced that he’s a traitor. But no one expects Tom to go.

It doesn’t hit Zoe quite so hard as Danny because things are going so well in her personal life, and her relationship with Danny suffers as a result.

“Zoe’s immediate reaction to Adam’s arrival is dislike. Anyone who takes over from Tom is going to have a hard time. She thinks he’s a bit of a wide boy and he really has to earn her respect … which eventually he does.

“In this series you get more of a sense of Zoe away from work and it made it more interesting for me, more exciting and much more of a challenge, getting away from the grid and being in different locations.”

Keeley has also starred in the BBC series Tipping The Velvet, Wives and Daughters, Our Mutual Friend and The Beggar Bride. She is about to start filming the new Michael Winterbottom movie, Tristram Shandy, co-starring Steve Coogan.