A psychotic patient threatens the hospital with a stolen Army tank; Dr. Kovac's French friend visits; an E.R. staffer has a heart attack; 13-year-olds have chlamydia.
Abby and Neela are assigned to a monthlong rotation in the neonatal intensive-care unit, and they experience emotional highs and lows while caring for the struggling infants.
Dr. Carter's inquisitive girlfriend (Thandie Newton) makes an impact as she observes hospital operations; Gallant is almost shot during a domestic dispute; Weaver dedicates a center to the memory of Dr. Romano.
As conditions grow increasingly desperate in Haven, Dwight struggles to maintain control over a terrified population. Meanwhile, Nathan assembles a task force to restore power to the town while Audrey tries to end the trouble.
Dwight and Charlotte work on a way to free Audrey from the Sandman’s stasis before he can trap her in his mind forever. Duke tries to help Darkside Seeker Seth Byrne recover his memories of Haven.