Ultimate Force: Slow Bomb

During an exercise at a nuclear power station, Henno and Dave are ambushed by Russian nationalists who seize a container of cobalt rods they use to build a bomb. As the government calls a crisis meeting and London is sealed off, the activists take their detonators to the roof of a tower block - but after Finn realises the device they can see is a decoy, the team face a race against time to locate the real bomb