Fet and Quinlan track a convoy carrying their prized nuclear weapon; Eph and Alex search for clues to uncover the Master's plan for the fate of the human race; a familiar enemy traps Dutch, who encounters an old friend as well.

Fet and Quinlan must figure out how to get the nuclear bomb back to New York, while a desperate Eichhorst draws near; love-struck Zack tries to learn more about his new crush, but makes a devastating discovery.