Nathan James finds itself trapped between the submarine and civilian blockades.

The fight for America comes to an end; Chandler faces a challenge that could change his life forever.

After the horrifying revelations and reversals of fortune in Baltimore, Chandler and his fractured team join forces with an underground resistance in an attempt to defeat Amy Granderson. With doses of the cure running low, Rachel tries to do some good for the sick while remaining a prisoner at Avocet. Meanwhile, Slattery and the crew of Nathan James are in a race against time to save an injured Dr. Tophet and regain control of their ship.

After a message is broadcast implicating the Navy in a devastating disaster, Chandler looks to infiltrate the network and regain the trust of the American people.

Chandler gets a lead that could help answer threatening questions. Kara does some digging in the White House.

Chandler faces his powerful enemy in a final showdown. Kara joins someone that can help with her mission.

Chandler returns to America to find out what has really been happening.

Chandler confronts his enemy — and his personal demons — in a final showdown, with the fate of humanity on the line.

With their mission now fully dedicated to spreading the cure, Nathan James puts a call out to civilians to meet at pre-selected ports across the country.

Chandler finds himself making a difficult decision when an order comes in from the White House.

The crew of Nathan James discovers that hospital ship USNS Solace was sent to sea to wait for Dr. Scott's cure. Captain Chandler sees an opportunity to add another ship to their fleet while Rachel is eager to find a lab better equipped to replicate the vaccine. When Solace fails to respond to radio communications, Chandler and his team board the ship...and come face-to-face with an unexpected enemy.

While XO Slattery struggles to evade a submarine, Chandler and his team infiltrate a compound on land.

The Nathan James must evade an overwhelming threat. A revelation in St. Louis puts President Michener in a terrible position.

Three years after overcoming the global famine, the United States Navy is ready to unveil its first fully functional fleet since the Red Flu pandemic, but a new type of threat may mean the next world war.

With nations being rapidly occupied, Chandler tries his hand at diplomacy to unite two hostile countries so they can fight a common enemy.

After the horrifying revelations and reversals of fortune in Baltimore, Chandler and his fractured team join forces with an underground resistance in an attempt to defeat Amy Granderson. With doses of the cure running low, Rachel tries to do some good for the sick while remaining a prisoner at Avocet. Meanwhile, Slattery and the crew of Nathan James are in a race against time to save an injured Dr. Tophet and regain control of their ship.

With a small group of survivors from Solace in tow, Chandler and his crew square off against an enemy of the most dangerous kind - a nuclear-powered submarine led by rogue British naval officers, Sean and Ned Ramsey. XO Slattery interrogates a captured mercenary from the hospital ship in an effort to extract information on the sub and its mission. As Nathan James engages in a perilous game of cat-and- mouse, the truth about the mercenary sub unfolds.

Chandler's mission becomes complicated as his position is worsened. President Michener faces pressure from the regional leaders.

Chandler's mission comes to a head as he prepares the final part of his plan. President Michener ponders the fate of his presidency.

The crew of Nathan James faces a threat that will test the limits of their Naval tactics and strategies.

With a devastating hostage situation occurring back home, Chandler must devise the perfect plan to avoid losing everything.

Rachel and Chandler ask for six volunteers to participate in human trials of her vaccine, but the tests could be a living hell as the virus and the vaccine do battle inside their bodies. Meanwhile back in the States, Chandler’s wife and father are doing everything they can to keep their family alive.

Chandler and his crew finally returns home, where a former D.C. power player is fending off a dangerous warlord who threatens her hopes of restoring law and order in society. Now with a location and a means to finalize their mission, Chandler sets out to save his dying family, only to discover something absolutely terrifying about this brave new world.

With Dr. Scott on the verge of a breakthrough, Chandler and his team set out to land in search of much needed supplies and materials for her lab.

Chandler must find a way to return to his old crew and investigate a dangerous new foe.