After a school shooting, Kovac and Benton care for the victims. Abby discovers Carter has been illegally injecting pain relievers. Greene and Weaver confront him about his issues. S6 Ep22
After witnessing the interaction between a dying woman and her family, Hathaway realizes she wants her family together and flies to Seattle to join Ross. S6 Ep21
While treating a 6-year-old patient involved in a minor car accident, Malucci and Cleo discover the girl has been sexually molested recently by her father. S6 Ep20
Abby tries to convince the teenage half-sister of a leukaemia patient to get tested to see if she's a bone marrow match. Carter seeks psychiatric help because he can't sleep. S6 Ep19
Carter sadly discovers that Lucy got accepted as a resident to the psychiatry programme at County General. Greene lovingly tends to his dying father at home. S6 Ep18
Chen's patient refuses to reveal to his daughter that she may have inherited a disease from him. Weaver defies Romano's authority and performs a procedure that gets her suspended. S6 Ep17
Despite his pain, Carter returns to work and prescribes a controversial procedure for a suicidal patient. Greene tries to convince his father to undergo cancer treatment. S6 Ep16
Kovac witnesses an accident and saves the young victim's life. Carter slowly recovers from his brutal attack and undergoes excruciating physical therapy. S6 Ep15
Weaver finds Carter and Lucy almost dead from several stab wounds. The Police close off the crime scene. Benton successfully operates on Carter, but Lucy cannot be saved. S6 Ep14
Carter arrives too late to help Lucy with her schizophrenic patient. The patient stabs Carter. Carter falls and sees Lucy lying on the ground soaked in her own blood. S6 Ep13
Two boys brought in after a fight leads Cleo to discover that one of them has been injecting himself with hormones. Hathaway's obstetrics nurse, Abby Lockhart, joins the ER. S6 Ep12
Lucy's patient finally gets a heart transplant but does not survive. Corday tricked her patient who murdered several women and now he's being transferred to a county jail. S6 Ep11
To get her patient to tell her the location of a missing body, Corday agrees to grant him a fatal wish. Deb Chen returns to County General using her Chinese name, Jing-Mei Chen. S6 Ep10
Kovac and Haleh take care of Hathaway's twins so she can get some rest. Lucy endeavours to get a heart transplant for a woman and begs Romano to perform the surgery. S6 Ep9
Complications arise as Hathaway delivers twins, Tess and Kate. Greene, Hathaway's Lamaze coach, rushes to the hospital to be with her during the delivery. S6 Ep8
Jeanie resigns because she wants to stay home and take care of her son. Greene and Weaver use a fake patient to convince Lawrence that he needs help. S6 Ep6
Recommendation from Weaver allows Jeanie to have temporary approval as a foster parent for baby Carlos. Corday successfully performs a mastectomy on Elaine. S6 Ep3
When Anspaugh decides to retire as chief of staff and return to surgery, he appoints Romano as his replacement. Greene expresses reservations about the decision. S6 Ep1
Hathaway informs Ross about her pregnancy. Just when Romano thinks he's convinced Benton to join his cardiothoracic team, Benton accepts the trauma fellowship. S5 Ep21
A storm causes a power outage, and the back-up generators fail. A comatose patient from another floor is beaten, sexually assaulted and left at the ER. S5 Ep20
Romano forces Benton to choose between two fellowships. Greene and Corday become better friends on the way to a conference. Lucy shows impressive skills during her rotation. S5 Ep19
Weaver visits a woman she thinks might be her biological mother. But later realises she cannot be. Hathaway makes an appointment to consult an obstetrician about her pregnancy. S5 Ep18
Emergency personnel work to save the lives of children involved in a school bus crash. Mobalage's wife suffers from multiple stab wounds. Ross resigns from the hospital. S5 Ep15
Romano suggests Benton enrol in a programme whereby he would substitute for doctors at rural hospitals for high pay. Jeanie and Ross are involved in an accident on an icy road S5 Ep14
Corday refuses to testify against Romano after he threatens Benton's career. A harried Anspaugh accepts Romano's offer to serve as acting chief. S5 Ep13
Ross jeopardizes a hospital study when he administers an experimental drug to a patient without the hospital's consent. Doyle accuses Romano of sexual harassment. S5 Ep12
A curious Greene discovers Lee's a fake and that Anspaugh never checked her credentials. Greene ponders becoming an astronaut after a friend recommends him for a mission. S5 Ep11
Benton refuses to let Romano operate on a patient when it becomes evident that she is intoxicated. A brain dead patient gives the gift of life to a girl with his rare blood type. S5 Ep10
Since today is the hospital's 100th anniversary, new chief Amanda Lee arranges for Carter to escort a woman, Ruth Johnson who was born 100 years ago today, around the hospital. S5 Ep9
Carter and Lucy join forces to save the life of a young girl who desperately needs a blood transfusion. They search for her father, who is the perfect match for her rare blood. S5 Ep8
Frustrated with her inability to conceive, Hathaway confronts a pregnant woman opting for abortion. Weaver enjoys watching Asnpaugh struggle as interim chief. S5 Ep7
After the candidate chosen as chief of emergency medicine accepts a job at another facility and Weaver learns the committee is hiring someone else, she resigns as interim chief. S5 Ep6
Two medical students take drugs with alcohol and almost die at a party. An operation reveals that a couple's little girl is genetically male. Weaver gets disappointing news. S5 Ep5
A wounded gang member tries to leave the ER. Jeanie tells Ross she'd like to be his physician assistant. Weaver interviews for permanent chief of emergency medicine. S5 Ep4
Despite Weaver's objections, Ross gets the job as the new paediatric emergency room attending doctor. Greene treats a constipated horse and becomes Rachel's hero. S5 Ep3
To save money, Carter lives in a medical student dormitory as a resident advisor. Corday realizes that the only way she can stay at County General is to start over as an intern. S5 Ep2
Lucy Knight, a third year medical student, begins her first day in the ER. Placed on probation, Ross must report every procedure he needs to perform to Weaver. S5 Ep1
A psychiatric resident releases a man with lacerations on his wrist. Later he returns to the ER and his wife and children are found shot. The ER team work to save the family. S4 Ep22
A televangelist suffering from a kidney ailment wants to broadcast live from the ER to raise money. Romano is annoyed by Benton and Corday's romance. S4 Ep21
Benton and Corday continue a secret relationship. Benton attends his son's baptism. Millicent Carter pleads with Carter to give up medicine and help the family, but he refuses. S4 Ep20
The ER treats victims from the bombing of a family planning, prenatal care and abortion clinic. Carter takes care of an elderly patient who he believes is a victim of neglect. S4 Ep19
Bone marrow tests for Anspaugh come back negative, but Del Amico matches an out-of-state patient. Cater performs the procedure on her. Jeanie realises that Scott is terminal. S4 Ep18
Jeanie assists Scott during his final round of chemotherapy. Greene and Cynthia end their relationship, and Romano gives Corday and unjust and unfavourable 6-month review. S4 Ep16