June fights her need for violent revenge as Serena settles into her new role in Toronto. Rattled by Janine, Aunt Lydia makes a surprising suggestion to Lawrence.

June and Luke embark on a dangerous quest. Serena gets to know her new hosts.

June and Luke’s mission puts them in serious jeopardy. Serena senses a threat from her benefactors. Lawrence and Nick make a shocking power move.

Miller gains valuable information from a hidden data cube. Holden and his crew learn their host’s agenda.

Holden finds an unlikely ally. Miller’s obsession with Mao intensifies.

Team One is called to a high-security psychiatric hospital where a violent patient has taken a guard hostage and injured a fellow patient.

Pratt struggles to diagnose a woman who suffers mysterious chronic seizures. An attractive woman, Campbell, informally accuses flirtatious Pratt of sexual harassment. Abby ponders how to get her contentious patients’…

Carter takes Kem to the hospital to check on their baby since it’s not kicking anymore.

Morris streets a patient without getting a psych consult, and the guy steals a tank and heads for County. Gillian is visiting Luka, and Sam’s not happy about it. Luka…

Abby and Neela are assigned to a month-long rotation in the neonatal intensive care unit where they experience emotional roller coasters while caring for the sick infants.

Dr. Carter’s girlfriend makes an impression as she observes ER operations. Dr. Gallant is almost shot during a domestic incident. Dr. Weaver dedicates a center to the memory of Dr….

On Thanksgiving Day, a helicopter crash outside the ER leaves several injured, and kills Dr. Romano. Alex tries to bring Sam and Luka together.

Neela helps treat two Amish teens who were in a car crash. Sam argues with Dr. Kovac when he pays too much attention to her son.

Carter returns to County General to hearty welcomes. Although Abby is shocked to learn that Carter’s beautiful African girlfriend, Kem, is already pregnant with Carter’s child, Abby has moved on…

Pratt and Kovac clash over a miscarriage-prone young woman, Denny, who arrives to deliver a premature baby. Pratt wants to make heroic efforts to save the unborn child, while Kovac…

To everyone’s amazement, Lewis makes a date to share a home-cooked dinner with the elderly Ben Hollander, her depressed patient who is going blind.

Confident second-year resident Pratt wants to prove his abilities when he works the graveyard shift (11 p.m. to 7 a.m.), but his heroics sometimes backfire. Pratt shows contempt for a…