Annie comes back into the CIA fold, ramping up the "chemical weapons" aspect of the MK Ultra project. Meanwhile, Leon proves to be a valuable asset to Brendan after he's given the chance to work directly with Lamar Olivier, leader of the Crusaders. Brendan gets closer to being exposed after Jamie's investigation leads her to a victim of his drug testing. Finally, Brendan delivers Annie's weapon to an unsuspecting public with devastating results - and gets a taste of his own medicine.