Expo Lana Washington is giving a routine talk, having just returned from secondment, when an explosion rocks the heart of the city. But is she ready to return to active duty?

The police launch an investigation to find the bombers, whose skill and sophistication keeps them one step ahead. Under pressure to get results, Helen makes a breakthrough.

As the team mourns Thom’s death, a new lead emerges – an informant, promising intelligence on the terror cell. Meanwhile a journalist is sent a suspicious package…

Alex contacts the police with critical information about a new attack planned for that day, but Commander Francis warns the team against placing too much trust in him.

Lana breaks protocol to try to help Alex, knowing he has nobody else to turn to. Then the team makes a shock discovery about the terror cell they’re tracking down.

An amnesic, disgraced U.S. operative is dragged back into the deadly spy world when a colleague goes missing. But to find her, he must remember his past.

Bomb Disposal Officers Lana Washington and Joel Nutkins receive a call to an emergency police operation investigating a potential bomb factory.

As the bombing campaign intensifies, Explosives Officer Lana Washington attempts to solve the mystery of who is behind the terrifying attacks.

Lana struggles to cope with the dangers of her job, but finds support in her budding relationship with Karl. After a terror group claims responsibility for the mosque attack, the bombing campaign intensifies with an attack on an LGBT target.

Lana works with New Scotland Yard to hunt The Crusaders before they carry out another terror attack, and she is confronted by the horrifying possibility that someone close to her could be involved in the bombing campaign.

Lana battles her inner demons as she blames herself for the devastating loss. When the Counter-Terrorism team identify the bomber, Lana is determined to track him down.

A desperate manhunt for the mastermind behind the bombing campaign plunges Lana Washington's EXPO team into ultimate danger.

Lana is faced with an impossible decision when she is kidnapped by the terror cell. A choice between her duty and saving those who matter the most to her.

Explosives Officer Lana Washington and her team are called to investigate a suspected bomb threat – an iconic, London Black cab that’s been abandoned in a wasteland.

With two incidents appearing to be connected, Counter Terrorism police work to establish a link between the victims – a retiree and a university lecturer.

As the police investigation makes good progress, the bomber’s campaign intensifies, putting more people in grave danger.

The team rush to find the last missing person before it’s too late. And Lana, now in the bomber’s sights, has to work harder than ever to avoid falling into his traps.

Lana rushes to stop the bomber’s next attack. But outside of their control, both are thrown into new territory neither one is prepared for.

Questioning the bomber’s actions, Lana follows him to the very end, finally learning the truth behind the murders.