Joanne Froggatt also starred in Life On Mars
Filming has started on a Spooks spin-off for BBC Three.
The new spy drama, titled Spooks: Code 9, is currently being shot in Bradford and will hit screens later this year.
The drama is set in 2013, when London has been evacuated following a nuclear attack, and MI5 must establish field offices across the UK.
The series, starring Joanne Froggatt, focuses on the six young spies recruited to help set up the new Field Office 19.
She plays Hannah, who leads a team of rookie spies which includes a mathematician, ex-police officer, a former criminal gone straight, a junior doctor and a student.
Producer Chris Fry said: "After the bomb, MI5 needed new officers with ability, dedication and potential on the streets as soon as possible.
"With the exception of their team leader, none of them have been in the field for more than four months and they will continually find themselves in situations beyond their experience and training - they'll only succeed through grit and determination."
BBC Fiction controller Jane Tranter said: "It's brilliant to have the chance of looking into the future of Spooks with Spooks: Code 9 on BBC Three.
"The series promises to be as entertaining and action-packed as Spooks on BBC One has always been, whilst bringing a more maverick, younger perspective."