On The Last Ship Season 2 Episode 6, CDR Chandler's vendetta against the submarine crew has him chasing a group of mercenaries into Florida after Rachel's mentor, Dr. Hunter, is murdered.
On board the Nathan James, Dr. Scott attempts to complete Hunter's work to aerosolize the cure.
Meanwhile, Sean is putting his plan for the American Immune into action, despite Ned's objections. The discord between the brothers is mirrored in the tensions onboard the Achilles. Ned's interference with Sean's orders may turn out to be a breaking point.