In a post-9/11 world, how do you prepare for the unthinkable? This alarming HBO Films thriller chronicles the hypothetical story of how a terrorist 'dirty bomb' attack might be planned and executed in London despite the best efforts of law enforcement--as well as how devastating such a strike would be. Warned of the possibility of a radioactive-weapons attack, members of Scotland Yard--including an Islamic undercover detective and several high-ranking terrorism experts--desperately try to find the perpetrators before they can construct and detonate their dirty work. But when the worst happens in the financial heart of London, the city's inadequate emergency services are put to an immediate test...with disturbing results. Louise Delamere, William El-Gardi, Alastair Galbraith star. Directed by Daniel Percival; screenplay by Percival and Lizzie Mickery.