1. Episode 1
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.
Trigger Point — Series 4
2. Episode 2
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...
3. Episode 3
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.
4. Episode 4
With talks of a possible catastrophe to come, Lana and her team are on edge as they are directed to an airfield.
5. Episode 5
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.
6. Episode 6
The final showdown forces Lana into a life-or-death situation as she races against the clock to save thousands of lives.