1The Terror
In the aftermath of the devastating 7/7 London bombings, another terrorist cell plots an attack.
2The Hunt
A police surveillance operation ends in tragedy after an innocent tube passenger is shot dead.
3The Whistleblower
As the Met grapples with the fall-out from the shooting, a secretary makes a life-changing decision.
4The Verdict
With the police force engulfed in crisis, senior officers are confronted with hard truths.