When the crew of the U.S. ballistic missile submarine Colorado refuse to fire nuclear weapons at Pakistan without confirmation of the orders, they are fired upon and declared rogue enemies of their own country.
Cast: Andre Braugher, Scott Speedman, Daisy Betts, Dichen Lachman, Daniel Lissing, Sahr Ngaujah, Autumn Reeser, Jessy Schram, Robert Patrick, Omid Abtahi, Darri Ingolfsson, Raj K. Bose
A brutal battle for control leaves the Colorado vulnerable to capture by a third party with a manipulative plan.
Kylie works with Admiral Shepard to bring down the President, using evidence of what really happened in Pakistan.
A typhoon, a mutiny and a Washington coup d'etat will force Marcus and his crew into unlikely alliances. As Sam's grief strains his loyalty to Marcus, will Sainte Marina get the supplies it so desperately needs? How far will Marcus go to ensure the crew's survival -- will it cost him his life?
Sam and James depart the island in a daring rescue attempt. Back on the island of Sainte Marina, a Chinese diplomat arrives to make a deal with Marcus. With scarcity and a prison problem plaguing him, Marcus finds himself treading down a more treacherous path than he could have imagined.
The crew waits for a visit from its families; Marcus must contemplate the unthinkable; the reason for the attack on Pakistan is revealed.
Marcus brings the islanders and the members of the Colorado together for a feast in the spirit of Thanksgiving; Grace searches for the truth when an essential crew member is accused of a crime.
Sam and Marcus look for the traitor who stole the nuclear launch key; when Prosser disobeys orders, he starts a conflict he can't control; Grace and James try to defuse a dangerous situation.
The crew is hit with an attack by an unknown force unlike anything they've seen before. As confusion and aggression take hold, Marcus and Sam can no longer trust their own senses even as they race to save the sub and defend the island.
In an attempt to end the standoff on Sainte Marina, Marcus and Sam enter into tense negotiations with the U.S. Government. Meanwhile, when a critical system fails, Grace must take command of the Colorado on a perilous repair operation.
Even as Marcus and Sam learn that they have been charged with treason against the United States, a greater threat within their own crew is brewing. Meanwhile, an old friend of Sam's, Paul Wells , pays Christine a visit and tries to ease her fears about her husband.
Marcus leads a search for three missing crew members of the Colorado, a search that leads them to Serrat's compound, where they receive an ominous demand. Meanwhile, a clandestine meeting between Kylie and Admiral Shepard confirms that the order to fire came through a back channel.
More than 20 warships are closing on the 200-mile perimeter that Marcus Chaplin declared as a no man's land around the island. And as XO Sam Kendal is drawn into a battle on the ground to keep them alive, Prosser confronts Marcus about something personal to him that could be impacting his judgment as Captain of the Colorado.
With nowhere left to turn, a nuclear missile sub Captain and his XO will go on the run and bring their crew to an exotic island.