Rachel and Monroe battle with more than wits. Meanwhile, Miles, Charlie, Nora and Aaron get inside the Tower but Tom Neville and son Jason get shut out. Miles and Monroe once again face-off, this time even more lethally.

When the past catches up with Miles and Monroe in the form of mutual heartthrob, Emma all hell breaks loose for them physically and emotionally. Charlie and Nora are the ones who rescue Miles this time. Meanwhile Aaron’s life is turned inside out while accompanying Rachel on her tenacious trek to the mysterious Tower where she plans to restore the power.

After Charlie and Nora rescue Miles from Militia, they set off to meet Aaron and Maggie. Tracking Miles and Charlie at every turn is Nate. As the gang reunites and continues on their journey, unforeseeable challenges await.

Miles and the gang are bound for Monroe’s lair – Independence Hall, but their efforts are impeded when they begin to have difficulty separating fantasy from reality. Meanwhile, Monroe starts to grow suspicious of Rachel.

Paranoia strikes Monroe deeply as Neville disappears and Neville’s son Jason makes a big decision. Meanwhile, the familial bond between Miles and Charlie grows stronger. Elsewhere, Miles experiences romantic attraction with both Rachel and Nora. Rachel sets off on her dangerous quest to infiltrate the Tower and restore power to the world before Monroe can ignite a nuclear device.

In the gang's quest to rescue Danny, the time has come for Miles and Monroe to meet face to face. Meanwhile, on the verge of reuniting with her brother, Charlie is conflicted by a shocking discovery and Rachel tests Monroe's patience.

Romantic connections heat up between two couples -- Miles and Nora and Charlie and Jason -- but disastrous drone strikes from the Militia threaten them all. An assassination attempt on Monroe heightens his paranoia and Georgia Federation President Foster contemplates surrender. Meanwhile, Rachel and Aaron push through the Plains Nation into Colorado.

As the gang nears Neville and his men, their hopes of finding Danny grow until a shocking discovery threatens to impede their efforts. Meanwhile, orders from Monroe have upped the value of Danny's life and Nora connects with a fellow Rebel.

Neville faces danger and hard choices as Monroe doubts his loyalty, he disowns his son Jason and gets captured by Miles. Rachel and Charlie begin slowly patching their relationship only to be pulled apart again as Rachel suddenly embarks on a quest to restore the power and her self-respect. She must make a dangerous journey to the mysterious Tower as it holds her only chance at redemption.

In order to rescue Danny, Miles knows he and the gang will need help. Thus, the search begins for Nora, a rebel fighter battling against the Militia. Meanwhile, Aaron confides in Maggie and Danny lays witness to what Captain Neville is capable of.

In order to save Nora from her injury, Miles leads the gang on a detour to visit an old acquaintance of his for medical support, but they quickly find themselves in unfriendly territory. Aaron recalls his meek history as he looks back at his pre/post-blackout life, and Neville delivers Danny to Monroe.

When Nora encounters a close relative, she must make a difficult choice between family and a promise. Meanwhile, one of the most ruthless members of the Militia is tracking Miles, Charlie and the gang and General Monroe hands Captain Neville a stern warning.

Miles and Tom Neville find themselves fighting for the same cause but Miles still doesn’t trust him. Charlie, Jason and Nora attempt to pull off a daring river rescue of Dr. Stephen Camp to keep deadly anthrax out of the hands of Monroe. Meanwhile Rachel and Aaron are captured and threatened by Militia forces.

A captive Nora is tortured and left for dead. Monroe learns of Rachael’s attempt to reach the Tower but is unaware of her deadly plan for him. Meanwhile, Miles is desperate to find out how so many of his close associates are being brutally murdered. Later, Miles, Charlie, Neville, Jason, Hudson and Sanborn struggle to make it out of the Plains Nation to join Rachel and save her from what they believe to be certain death.

A family struggles to reunite in an American landscape void of electricity: a world of empty cities, local militias and heroic freedom fighters, where every single piece of technology -- computers, planes, cars, phones, even lights -- has mysteriously blacked out forever.

A final act of heroism by one of their own saves the lives of Charlie and the gang, but the loss devastates everyone and they must carry on with heavy hearts but increased resolve. Miles sets out on a mission with Nora to recruit his former Militia comrade, Jim Hudson and enlist his savage killing skills. Meanwhile, Rachel looks for a power source and a way back into the heart of her daughter Charlie. Rachel also attempts to elude the grip of Randall Flynn, her ruthless former boss and ally of Monroe.

Life-threatening dangers abound on all sides as the Rebels infiltrate the Tower. Miles' leadership abilities and character are sorely tested as well as his feelings for Rachel and Nora. Aaron's genius comes in handy while Tom Neville and Randall Flynn bring new meaning to the dark side.

On the run from Militia, Nora leads Miles and Charlie back to the Rebel camp. Meanwhile, Aaron and Maggie search for Grace and Danny stands up to one of Captain Neville’s men.

When Charlie meets a boy who's suffered a plight similar to her own, she relates and longs to help him and his young friends. First, she must convince Miles. Meanwhile, Rachel grows weary of General Monroe as she meets someone from her past.

Miles leads the rebel squad out of Philadelphia and away from Monroe’s helicopters and machine guns. Meanwhile, a guilt-ridden Rachel tries to redeem herself by providing power to the rebels, but once again must leave her children, Charlie and Danny, behind. As if there wasn’t enough heat, romantic sparks ignite between Miles and Nora.

Miles's life is in grave danger as he finds himself in the clutches of Titus Andover. Charlie is determined to find Monroe, as Rachel and her father, Dr. Porter desperately attempt to revive Aaron. Meanwhile, Neville hatches a plan to infiltrate the Patriots.

As Miles and the gang try to escape the perils of their current situation, Rachel and Gene continue to struggle with their relationship, which affects Charlie. Meanwhile, Neville takes a gamble with the Patriots.

When Miles leads Monroe and Rachel south of the border; they're met with much more than they bargained for as Neville and Julia dance a delicate dance. Meanwhile, Charlie and Gene continue their search for Aaron.

Monroe finds himself in unfamiliar territory and must make a choice about his son Conner, while Neville and Julia continue to tango at Jason's dismay. Meanwhile, Gene leads Charlie to an uneasy discovery.

Truman, empowered with new authority from the President, launches a mustard gas attack designed to kill Miles and Monroe. To Rachel's disappointment, Miles agrees to join Monroe in a ruthless plot to beat the Patriots at their own game. As Neville faces his own challenge from the Patriots, Aaron grows increasingly alarmed by the power of the nanotech.