Episode 4
Following the murder of a Counter Terrorism officer, Lana Washington and the EXPO team race against time to stop the bombers before they strike again.
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More from this season
S1 E1
Episode 1
Bomb disposal officers Lana Washington and Joel Nutkins are called out to a Met counter-terrorism operation at a London housing estate to investigate a potential bomb factory and suspected bomb-maker Andy Phelan.
S1 E2
Episode 2
As the bombing campaign intensifies, so do inter-community tensions as the far-right group English Flag take to the streets to blame Islamists for the attack.
S1 E3
Episode 3
A far-right group called the Crusaders claim responsibility for the mosque attack. Lana finds a forensic link between the bomb at the mosque and the one at Westhaven - were they both bombed by the same person?
S1 E5
Episode 5
Lana struggles to come to terms with her personal loss, and her failure to prevent the explosion. Meanwhile, Counter Terrorism officers identify the bomber and launch a massive manhunt.