"In the shocking series finale, Agent Zero learns of a powerful thermonuclear bomb which, set off in the right place, could kill tens of millions. In a breathtaking twist, he learns of something else that will make it even more deadly. The fate of the world is literally at stake as Agent Zero finds himself in a mad race against time, the only person on the planet with a capacity to find the weapon. Yet, while Zero races to find the location, he is up against other formidable forces: dozens of assassins are dispatched to kill him.
And in the midst of all this, the time has come for Zero to have a final reckoning with his own deteriorating health."