Series 4

Explosives officer Lana Washington and her bomb-disposal team track a suspicious lorry through London as they work against the clock to make sure it does not reach its destination.

Lana and her team spring into action after the previous attack, with clues leading them to a boatyard, but the bombers stay one step ahead...

From Lana's hard work, Counter Terror are able to make a breakthrough - sending Lana and her team to a disused workshop to find any information they can on the bombers' next steps.

With talks of a possible catastrophe to come, Lana and her team are on edge as they are directed to an airfield.

When a colleague's life is in danger, Lana and the team do all they can to rescue them as Counter Terror race to uncover the true identity of the bombers.

The final showdown forces Lana into a life-or-death situation as she races against the clock to save thousands of lives.