Episode 1

E1

In the aftermath of the devastating 7/7 London bombings, another terrorist cell plots an attack.

Episode 2

E2

A police surveillance operation ends in tragedy after an innocent tube passenger is shot dead.

Episode 3

E3

As the Met grapples with the fall-out from the shooting, a secretary makes a life-changing decision.

Episode 4

E4

With the police force engulfed in crisis, senior officers are confronted with hard truths.