Unexpected alliances are forged and an important figure instills confidence in the wake of the confusion.

When the only way to stop Fanning and the virals' escape from Project NOAH involves a dangerous explosion that could leave Brad, Sykes, and the cure for the virus caught in the crossfire, Amy must be the one to decide what's best for humanity. In the wake

As Amy experiences symptoms of the virus that indicate she is close to turning, Brad brings everyone together, and Lila and Sykes race to perfect an anti-viral medicine to save her from Fanning. Meanwhile, Richards tries to keep Project NOAH contained whe

Brad and Lila flash back through their history together as they plan to save Amy. The Secretary of Defense gives Horace Guilder full authority over Project NOAH, leaving Sykes and Richards terrified for what his plan of attack might entail. Meanwhile, the

Tensions are high with a viral on the loose outside Project NOAH, as Guilder and Richards hurry to mobilize a search party. Amy volunteers to help in an unexpected way, causing friction between her and Brad. Meanwhile, Lear tries to help a lucid Elizabeth

With the sudden arrival of a high ranking official, Horace Guilder, to Project NOAH, Brad and Amy begin to strategize a possible escape plan with the help of an unlikely accomplice. Meanwhile, Sykes and Richards begin to question each other's motives, and

In an attempt to protect Amy, Wolgast convinces Sykes and Lear to let them outside of the facility for exercise. As emotional flashbacks reveal Carter's life leading up to his death-row sentencing, Fanning's hold on those kept inside Project Noah grows st

After being brought to Project NOAH, Brad strikes a deal with Sykes and Richards to stay with Amy as testing of the virus on her begins. Meanwhile on 4B, Richards makes a decision about Babcock that leads him to learn how she ended up on death row to begi

A wounded Brad and Amy continue on the run from Richards and attempt to seek refuge with an elusive, ex-military instructor of Brad's, while Lila tries to help from afar. Meanwhile at Project NOAH, Dr. Lear reflects on the decisions that compelled him to

As an imminent flu epidemic threatens the U.S., Federal Agent Brad Wolgast is the man tasked with bringing in the experiment's latest chosen test subject, a ten-year-old girl, Amy Bellafonte. But, after meeting Amy, Brad's loyalties to Project NOAH are te