Darwyn's cover is in danger of being blown when Farik begins to suspect that there is a traitor in the cell.
Farik recruits a bio-chemical student to become a member of the cell in order to test the anthrax that he and Ilija have received and Darwyn discovers that they plan to release the anthrax inside of a mall.
When the cell's major source of funding dries up, Farik takes Darwyn and Christian down to Mexico to deal with the problem.
Farik sends his recent recruit, Eddy, to retrieve and smuggle anthrax into the country from Canada.
The cell members pose as Iraqi insurgents-in training so as to take control of a converted warehouse for their own purposes.
Darwyn befriends a chemical plant worker in order to procure some of the company's product under the table.
Darwyn tries to steer a young Afghani boy away from life as a terrorist.
The cell negotiates to buy explosives from some white supremacists while the LAPD begins to investigate Darwyn, thanks to Gayle tipping them off.
The cell hijacks a chemical truck in preparation for Youmud Din.
The FBI races to prevent the cell from carrying out their attack after discovering the clue that Darwyn has left to alert them to the real target.