Darwyn resurfaces in a sleeper cell despite his attempts to start a new life; Farik withholds information despite the interrogation; terrorists in Sudan behead Darwyn's FBI associate.
Ilija plans to flee to Europe; terrorists order Darwyn to procure a weapon but the FBI isn't inclined to cooperate; Farik is shipped off to Saudi Arabia.
Blaming himself for Gayle's death and Mina's successful suicide bomb attack, Darwyn embarks on a suicide mission of his own, heading to Yemen to seek out Farik one last time.
Darwyn Al-Sayeed is a Muslim ex-con who has just been released from prison and finds his way to an Islamic extremist named Farik, who recruits him to join a terrorist sleeper cell planning an attack in Los Angeles.
Farik sends biochemical student Eddy Pangetsu on a flight to Vancouver, Canada, to drive a shipment of real anthrax across the Canadian border down to Los Angeles.
The cell members pose as Iraqi insurgents in training, in order to infiltrate and take over a secure warehouse as the new base of operations for Youmud Din.
Darwyn befriends a pesticide-plant worker in order to buy some of his company's product under the table for the cell, while each of the jihadis cope with personal troubles of their own.
When an Afghan boy arrives at the warehouse looking to be trained as a jihadi, Darwyn introduces him to a more moderate brand of Islam in the hope of steering him away from terrorism.
The cell buys explosives from a white supremacist militia, while Darwyn's new handler, Patrice Serxner, tries to prevent the LAPD from blowing his cover in another investigation.