The Cell.

Is Al-Qa'eda about to attack London? Who is the traitor in Britain, manipulating his opponents mercilessly? Time has run out. This Tweed does know. But what is the target? When and where will the attack be launched? Panic grips Whitehall and Tweed is road-blocked by bureaucrats at every turn. Unless Tweed's team track the mass killers, thousands of Londoners will be annihilated. Tweed brings in the SAS. The climax - along the Thames and London's most famous bridges - is shattering.