Provider: Eastern (ET) Change
Chandler and his crew duel against rogue British naval officers manning a nuclear-powered submarine. Meanwhile, Slattery interrogates a mercenary to learn more about a hospital ship, and a dangerous game of cat-and-mouse ensues.
Chandler tracks the Immunes to Northern Florida in a bid to avenge the destruction of the labs. Elsewhere, Rachel unearths a secret yet incomplete cure formula, and Chandler's team locates an Immune compound controlled by Sean and Ned.
Chandler tries to gain intel and reverse the brainwashing suffered by Michener. Also: Rachel attempts to construct Dr. Hunter's lost formula while wrestling with the knowledge that her bitter enemy is now on board the Nathan James.