After another hospital shuts down, the ER is flooded with patients. Dr. Pratt resuscitates a heart-attack victim who had been pronounced dead.

Casualties of a disaster flood the ER, which is short-handed because everyone is at Dr. Carter’s going-away party because he’s leaving the ER after 11 years. Dr. Pratt looks for…

Dr. Carter leads a walk-out of staff protesting lack of security in the ER.

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’…

Dr. Carter, Abby and other staff of the ER are quarantined as the CDC investigate a mysterious, deadly outbreak.

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

Carter misses his pregnant girlfriend who has returned to Africa. A family of four is rushed to the emergency room after suffering carbon monoxide poisoning from their faulty furnace–forcing the…

Neela (who’s in Chicago) and Gallant (who’s in Iraq) miss each other and write letters. Gallant also tries to save the life of a little girl.

Weaver rushes to the aid of her female life partner, Sandy Lopez, when the firefighter is severely injured while working and must now battle for her life. Frightened Weaver whispers…

Gang members kidnap Abby hoping she can save one of their members with a gunshot wound. Ray starts treating a patient, but when she requests a new doctor, he gets…

A wounded police officer’s teenage son must make a life or death decision. Abby tries to convince a girl needing appendicitis surgery to stay at County, but her fathers wants…

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…

Abby has a dialysis patient in critical condition, but she cannot find his physician, who does not want to be bothered during the holidays.

A rape victim, barely able to speak, does all she can to help police find her attacker.

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…

After being shot at, Pratt, Jing-Mei and Elgin are trying to get of their sinking car. Sam took Alex with her while fleeing for Steve, Kovac is considering to go…

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…

Neela is still struggling with her decision not to continue becoming a doctor. We discover that Ray is in a band. Kovac and Sam are amoureux, but where does that…

It’s a busy Fourth of July and Carter is the only attending working.

Carter returns from Africa, going straight to Abby’s bedside. Her response to seeing him is to ask for her key back. She is very chilly towards him all day until…

Luka Kovac arrives safely at County General and is hospitalized for treatment. His friend Gillian delivers John Carter’s letter to Abby.

Neela treats a religious teenage girl who turns out to be pregnant. Abby and Kovac struggle to figure out what to do with her unexpected pregnancy.

Neela treats a religious teenage girl who turns out to be pregnant. Abby and Kovac struggle to figure out what to do with her unexpected pregnancy.

A kidnaped girl is the victim of police shooting. Abby is stuck in the middle of a disagreement between Luka and Clemente. Neela receives a phone call from Iraq. Later,…

A kidnaped girl is the victim of police shooting. Abby is stuck in the middle of a disagreement between Luka and Clemente. Neela receives a phone call from Iraq. Later,…

Gallant impulsively asks Neela to marry her that exact day, she says I do but soon gets cold feet. Morris stands up to Weaver on a patients course of treatment….

Gallant impulsively asks Neela to marry her that exact day, she says I do but soon gets cold feet. Morris stands up to Weaver on a patients course of treatment….

A new attending, Dr. Victor Clemente, comes aboard and quickly makes a stir on the ER. Abby’s breast cancer patient convinces her to take a long awaited test. Luka befriends…

A new attending, Dr. Victor Clemente, comes aboard and quickly makes a stir on the ER. Abby’s breast cancer patient convinces her to take a long awaited test. Luka befriends…

Much to Ray’s dislike, a surrogate mother in labor doesn’t want to have a C-section and endangers the life of the baby. Meanwhile, Sam tells Luka she and Alex are…

Much to Ray’s dislike, a surrogate mother in labor doesn’t want to have a C-section and endangers the life of the baby. Meanwhile, Sam tells Luka she and Alex are…

Luka has a very bad day: New nurse manager Eve Peyton notices he doesn’t want to work with Sam and tells him so. At the end of the day he’s…

Luka has a very bad day: New nurse manager Eve Peyton notices he doesn’t want to work with Sam and tells him so. At the end of the day he’s…

Mark, still upset over the loss of Jodi O’Brien, takes the night off but ends up in the ER anyway, albeit an hour late, when the new chief runs a…

Susan has her hands full with a pregnant Chloe. Benton goes to dinner with Jeanie. Greene further alienates Swift when he decides to honor a family commitment rather than stay…

Mark and Jennifer struggle to remain together as Mark has moved in with her in Milwaukee. Doug coaches Jake’s little league team. Chloe’s irresponsibility wears Susan down. Carter asks Benton…

Susan is forced into the role of parent when Chloe gives birth and both Chloe and her mother, Cookie, shirk responsibility. Doug is surprised and a bit frightened when Diane…

Carter faces his last day in the hospital with aplomb, harshly grading Benton on an evaluation report. He later rescinds the report after finding out that the surgical sub-I is…

Morganstern invites Mark to join the staff as an attending physician. Mark treats an woman with breast cancer, who begs him to kill her. Deb “wows” Benton with her amazing…

Carol worries about a Russian girl with AIDS who’s brought in and then abandoned by her foster mother. Kayson asks Susan to be his Valentine. Deb accidentally consumes LSD-laced chocolates.