Season Finale- 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, where all will receive the cure. However, small Immune factions remain active in their quest to fight the cure and fulfill Ramsey's dreams.
After retrieving the mastermind behind the Immune communications network, Nathan James finds itself trapped between the sub and civilian blockades set up by the Immunes. Chandler sends Dr. Scott and the cure off the ship under the protection of XO Slattery as the James heads towards its inevitable final showdown with the sub.
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.
Rachel is hard at work on a new, more efficient version of the cure while Alisha decodes a message found on a recovered cell phone.
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.
Still trying to piece together Dr. Hunter's lost formula, Rachel grapples with the fact that Niels, her sworn enemy, is now on board Nathan James, while Chandler works to gain intel and reverse the brainwashing Michener suffered at the hands of the Ramseys.
While XO Slattery struggles to evade the sub in the water, Chandler and the land team infiltrate the Immune compound. Danny poses as one of Ned's workers and discovers that Niels, a.k.a. Patient Zero, is now working for the Ramseys. Meanwhile, Captain Chandler manages to encroach on Sean's inner circle, which includes an important government official, Jeffrey Michener. Has Michener been brainwashed by the Immune propaganda along with the rest of the camp? Or can he be an ally? MORE -LESS
Chandler tracks a new threat to Northern Florida. Meanwhile, Rachel comes across a secret formula that her mentor, Dr. Hunter, had been perfecting.
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. MORE -LESS
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. MORE -LESS
Nathan James returns home to Norfolk on a mission. With his family now safely aboard the James, Chandler sends his crew in search of their friends and loved ones.
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. MORE -LESS
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. MORE -LESS