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President Martinez and Blake Sterling have the Sleepers surrounded, 
but after Sophia triggers a national disaster, negotiations ensue. 
Elsewhere, with a lead on the whereabouts of Dempsey, 
Sean and Vicky continue on their mission.

Thomas summons Sophia, Diane Geller, 
and the other Sleepers to reveal the contents of the game-changing message he received. 
With newfound intensity, President Martinez confronts Vice President Ray Jarvis about his betrayal. 
Sean blackmails Vicky into helping him on a mission of vengeance. Elsewhere, 
Dempsey continues on his hunt for experimental subjects.

Still reeling from the attack in Alaska, 
President Martinez reasserts control over the situation and his administration, 
counseled by Sterling and his Chief of Staff. Sophia learns the details of Thomas's murderous rampage. 
Thomas sets Sophia and Martinez further at odds. Elsewhere, 
Michael leaves Leila in safekeeping with a close friend, Diane Geller, while he goes on the hunt for Thomas. 
The NSA continues to decrypt the satellite transmission, hopefully before it's too late.

Meanwhile, newly appointed Alaskan Senator Catherine Lewis threatens to divulge information about the Mt. 
Inostranka detention facility on an episode of "HARDBALL with Chris Matthews." Elsewhere, 
Sean and Leila get a fresh lead on the whereabouts of Samantha, but it leads them to a dramatic turn in their lives. 
James Dempsey foresees that he and Sean will once again cross paths.

President Martinez and his longtime Chief of Staff charge the intelligence community with decrypting Thomas's satellite message, 
but more importantly determining to whom it was sent. While they are distracted, Thomas unveils a surprise attack, 
but he does not anticipate a heroic stand-off with Blake Sterling, who learns an important lesson about Sleepers from Maya.

President Martinez confronts the traitor in his administration, only to be met with threats of exposing the cover-up of Avias Air 514. 
Even after testing the loyalty of Isabel and Thomas, Sophia still suspects their subterfuge, so she sends Simon on a fact-finding mission. 
Her suspicions are confirmed when Thomas unveils a shocking new plan. Meanwhile, on the hunt for Samantha, 
Sean and Leila battle the mercenaries sent by Dempsey.

President Martinez reacts to the knowledge of who betrayed him within his administration. Meanwhile, 
after revealing her plan for the Sleepers' future, Sophia learns of dissension among her people. 
She sets a trap for the perpetrators and acts decisively to quell any future mutiny. Elsewhere, 
Sean and Leila try to unravel the mystery of Samantha's kidnapping, while evading Dempsey's nefarious clutches.

President Martinez, furious about recent security failures, demands answers from Director of National Intelligence, Blake Sterling. 
When he doesn't receive the progress that he desires, 
Martinez decides to personally interrogate Michael Buchanan about his involvement in the assassination attempt. 
While Michael holds to his claim that he doesn't know who is involved, 
he inadvertently reveals incriminating evidence about someone deep inside the President's staff. Meanwhile, 
Dempsey dispatches Vicky on a new clandestine mission. And, elsewhere, 
Sean and Leila scramble to stay ahead of the covert ops that are trying to silence them and what they know.

President Martinez orders Director of National Intelligence, Blake Sterling, to root out the mole from their staff, 
which causes Sterling to question his judgment of people close to him. Sophia reasserts her power over Thomas and the other detainees, 
and she prepares them for the next leg of their mission. Elsewhere, with the aid of Madeline, Sean continues his hunt for answers, 
all the while trying to stay one step ahead of the covert agents who trail him.

President Martinez and the Director of National Intelligence, Blake Sterling, fulfill their agreement with Thomas, but after their plan goes awry, 
they suspect that there is a possible mole in their midst. Elsewhere, Sean Walker digs for answers at Leila's home, where he encounters Madeline, 
a mysterious conspiracy theorist. Meanwhile, Simon's past is illuminated, and his allegiances are tested.

The biological threat intensifies. The CDC rushes to identify the contagion and treat the infected people, 
while the White House and Director of National Intelligence face a difficult dilemma in their negotiation with Thomas. 
Meanwhile, Simon appeals to Sophia to turn on Thomas. Elsewhere, FBI Agent Collier closes in on Vicky and Carter, 
but appearances are not always what they seem.

The White House grapples with a mysterious biological threat. Their only hope is to crack Sophia during interrogation. 
Meanwhile, Vicky and Carter keep their hostage captive while they await further instructions. FBI Agent Collier, on her search for Leila, 
stumbles upon Vicky's secret life. Elsewhere, a powerful businessman, Dempsey with classified intelligence and ties to the White House, 
emerges from the shadows.

President Martinez's administration unveils a tough new strategy to force Sophia to reveal the detainees' plan, putting into play a new detainee, Maya. 
Elsewhere, we learn that Vicky and Carter are in possession of a crucial hostage. FBI Agent Collier's suspicion grows deeper.

As the shockwave of the plane dissipates, President Martinez's staff must work quickly to assess what happened and how to respond. 
Director of National Intelligence, Blake Sterling, locks down Sophia for interrogation. The conspiracy widens, engulfing FBI Agent Collier and Carter, 
a mercenary with questionable ties. Meanwhile, a shadowy figure, Thomas, emerges with knowledge of the detainees and their plan.

Sean Walker stumbles into a national conspiracy after his girlfriend Leila mysteriously disappears from a Caribbean cruise. 
Elsewhere, President Elias Martinez is scheduled to announce the release of a group of detainees led by Sophia Maguire -- 
despite the disapproval of his Director of National Intelligence, Blake Sterling. 
Their futures are on a collision course in a global conspiracy that could ultimately change the fate of mankind.