Rosewood gets a massive storm on the day the students are to take their SAT test, which causes the school to postpone the examinations. Trapped in the school during the…

On Neela’s last day at County, she has doubts as to whether she is making the right decision.

As Carter prepares to open a new facility for the underprivileged, some old friends/colleagues gather. Rachel Greene, Mark Greene’s daughter, applies for an internship at County.

A camera crew interviews the staff at County General for a documentary on emergency medicine. Morris’ cop girlfriend gets injured on the job and is rushed into the ER with…

Neela and Sam are shocked when they arrive back to the airport with transplant organs only to find that their plane has left them. Dr. Carter gets a surprise visit…

Sam gets frustrated with Gates when he gets obsessed with finding a homeless war hero. Neela is upset at her intern after he gets the entire surgery department into a…

Abby awakens after the ambulance explosion and rushes to check on Pratt; Sam and Gates rush to the scene; Morris and Neela struggle to keep up with Pratt’s injuries.

Everyone in the ER is trying to cope with the loss of their colleague. The staff feels defensive toward the new Chief and her tough disposition. Gates and the new…

Neela is upset when she finds out Abby’s good news second hand; the new chief, Catherine Banfield, and Abby disagree on how to treat a gunshot wound victim; Abby defends…

Kovac is in Chicago looking for hospice-care work. Neela’s aorta surgery has caused an infection in her patient. Abby treats a teen who has been beaten up. Brenner continues to…

Abby is back from rehab and finds herself the object of scrutiny. She confesses to Pratt that Luka might stay in Croatia longer than planned. Harold seems to have won…

ER’s 300th episode finds Luka and Abby hurriedly preparing to travel to Croatia after Luka’s father passes away. Luka confronts Abby about the estrangement between them, and she eventually reaches…

After being passed over for Chief of the ER, Pratt is looking for a hospital that will appreciate his talents. A former employee of the ER brings her sick son…

Everyone at the ER is happily surprised to see Luka back from Croatia. Great news awaits Neela. Sarah once again needs rescuing by Tony, and patients are causing problems for…

Morris and Pratt cram for their medical boards when Morretti brings in a new attending physician to help with the load. Sam and Abby work on an attention-hungry patient who…

A power outage strikes on an unusually hot day, bringing nursing home patients suffering from hyperthermia to the ER. Abby and Pratt disagree about diagnostic tests for a fussy baby….

Kovac and Gates deal with a hopeless father whose son succumbs to heart failure; Pratt tries to resolve the tension between him and his brother; an Armenian man tries to…

Weaver cares for a Katrina survivor who’s reluctant to having surgery on her foot; budget cuts force Luka to make a difficult personnel decision. Also, Gates’ home life intrudes on…

Kovac and Gates treat a girl who appears to have been assaulted. When the police are no help with Ames, Kovac decides to confront the problem himself; Morris and other…

Abby and Kovac discover both the joys and difficulties of raising a newborn; Morris is wrongfully accused of being a child molester; Pratt has his trial-by-fire when he has to…

Kovac anxiously awaits the verdict between himself and Curtis Ames but fears the worst. Meanwhile, Neela disobeys her chief’s orders and also questions her feelings for Gates, and Weaver unwittingly…

As Abby and Luka cope with their newborn’s life and death struggle, the couple is shocked to receive a surprise visitor: Abby’s mother Maggie. Meanwhile, Sam fears the prospect of…

Gates is assigned to the case of a closeted gay man whose partner clashes with his family; Neela meets her new surgical chief, Dr. Crenshaw; and Pratt must cope with…

Weaver, Kovac, and the other doctors work frantically to try to save Jerry and a pregnant Abby, who were both critically injured during the shootout that left the ER in…

Chaos reigns in the ER when two prisoners are brought in for treatment, but instead plot a violent escape. Their desperate actions place one doctor in harm’s way, and forces…

Pratt departs for Africa with attitude to spare but makes his first contact with harsh reality before the plane lands. Abby senses something is not what is seems when she…

Abby and Luka desperately try to keep a young woman brought into the ER with stab wounds to the neck alive. As her condition begins to worsen, Clemente steps in…

Dr. Nate Lennox, a former professor with ALS, is brought in as the progression of his disease is chronicled through his own flashbacks as he is treated by each of…

An unexpected visitor puts Clemente in the middle of a domestic dispute. Meanwhile, Luka and Abby await test results on their unborn child; Neela struggles with her surgical elective and…

Pratt and Weaver try to create a Christmas miracle when they work to save a girl wounded from gunfire. Eve gets into trouble after punching a disruptive patient. Also, Abby…

Pratt’s half-brother tries to get him to make ends meet with his estranged father. Clemente treats an infant chimpanzee and involves Abby and Neela on the secret case. Eve promotes…

The ER prepares to take in victims from a plane collision, while Neela and Pratt head out to the crash site where Neela makes heroic efforts. At the end of…

The rainy night brings in diverse patients including a mother involved in a car accident with her baby, a man with a satisfaction facilitator, and a comatose patient who suddenly…

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…

Sam and Luka go on the search for her runaway son, Alex. Meanwhile, Pratt and Lewis guide Abby, Neela and Ray, who have become R2’s, on how to teach the…

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…

Jules ‘Ruby’ Rubadoux is back in the ER. He’s still angry with Carter about the death of his wife.

Morris is named the new chief resident, which makes nobody really happy, except Morris. Meanwhile Luka and Sam are having communication problems, Carter gets a promotion Susan really wanted and…

Sam’s ex-husband shows up and wants to take Alex on a trip. Gallant is back and Neela hopes to see him before he goes back to Iraq.

Doug’s one-night-stand has a seizure and he brings her to the ER.