Carter works in the Sudanese desert, helping treat hundreds of diseased people including a woman raped by a militant group. Back in the ER, the police accuse Clemente of shooting Jodie. Pratt and Neela work to save a 14-year-old involved in a hit-and-run accident, but Pratt is infuriated when he discovers who hit the young teen. Kovač refuses to let Clemente return to work until he is reviewed by the Impaired Physician Committee. Jodie awakens from her coma and tells the police about her shooting, and Bobby threatens Clemente's life.

The episode was rated 7.43 from 69 votes.

Back from Iraq, Gallant surprises Neela by impulsively asking her to marry him. Kerry steps in to the Kovac/Clemente battle, encouraging them to get along, which results in a competition to be agreeable. Ray and a somewhat rusty Kerry treat a man with hypothermia, leading Morris to take a stand regarding the best course of action. Luka, Clemente and Sam treat a boy with HIV whose mother refuses to believe HIV causes AIDS. At the day’s end, Neela and Gallant are married, despite Neela’s doubts. At the reception, Luka and Abby celebrate his appointment as Chief of Emergency Medicine and realize they want more than just friendship.

The episode was rated 7.44 from 78 votes.

A case involving two teens injured in a car accident proves baffling as the doctors try to determine why the girl is unconscious and why her male companion is so hostile toward the police, before Ray discovers he's deaf, and the cops jumped him. Neela copes with a visit from Gallant's bickering parents and Morris gets a tempting job offer from a pharmaceutical company. Olivia learns of Pratt's philandering. Kovač tells Abby that he is going to Darfur to help Carter, but when he realizes Abby is worried, he orders Pratt, who is just returning from suspension, to go. Sam enjoys the perks of working for Elliott. Ray struggles with some unresolved feelings for Neela as she decides to move back to Abby's apartment.

The episode was rated 7.45 from 77 votes.

Kovač, with Abby's help, works feverishly to save a young Turkish woman with multiple stab wounds. As the girls' condition worsens, Clemente steps in and decides to try a risky procedure; surprisingly, he and Kovac work together effectively for the first time, but unfortunately the patient goes beyond saving. Sam accepts a part-time job working for Richard Elliott. Neela pulls an all-nighter in preparation for a speech at a surgeon's convention but is disappointed when her speech goes awry, later reflecting on how close she and Ray have become.

The episode was rated 7.50 from 70 votes.

For Neela, what begins as a routine ride-along turns into a defining day when a commercial jet and a private plane crash over Chicago. As Clemente manages the trauma in the ER, Pratt joins Neela on-scene. Luka and Abby wake up together at Luka’s, but the crash soon takes them back to work, where the tension between Luka and Clemente continues. Sam recalls Haleh when extra nurses are needed, and earns Eve’s approval. As the day ends, Luka and Abby talk, and awkwardly decide to stay just friends while Neela has a welcome, and overdue, visitor.

The episode was rated 7.53 from 73 votes.

Pratt departs for Africa with attitude to spare but he quickly notices the scope of the horror there. Abby senses something is not what is seems when she treats a 12-year-old and her grandmother, then differs with Luka over the best course of action.Steve arrives at the ER complaining of a stomach pain. Clemente wants to release him but Neela thinks he needs to remain in the ER and is proven correct when Steve displays appendicitis. Morris and Dr. Albright argue about a patient, and Morris is proven correct. Clemente continues to be threaten by Jodie's ex husband.

The episode was rated 7.54 from 72 votes.

A kidnapped girl is used as a "human shield" by her kidnapper, and both are wounded during a shoot-out with police. While Abby treats the girl, she is caught in the middle of a dispute between Clemente and Luka over the girl's care. Neela assists Luka, then Dubenko, with the kidnapper. Later, Luka and Clemente argue over style and practice, leading Luka to put his name in as a candidate for Chief of Emergency Medicine. Abby takes her anger and frustration out on Luka, who responds by kissing her. Gallant’s leave is delayed, to Neela’s dismay, and Ray gets his comeuppance from Zoe’s father.

The episode was rated 7.62 from 73 votes.

Gallant is killed in a roadside bombing in Iraq. Clemente's behavior spirals out of control along with his paranoia about Bobby, and Kovač is forced to take serious action when Clemente smashes a passing taxi outside the hospital and is diagnosed with PTSD. Dubenko offers Neela a surgical residency, but she and the rest of the staff then learn about Gallant's fate. Pratt readjusts to American medicine while treating a seriously injured family of two sons and their father and learning the cause of their injuries. Morris is offered a job with a major pharmaceutical company.

The episode was rated 7.62 from 76 votes.

Abby and Kovač agonize over what to do about her unexpected pregnancy, with Abby eventually deciding to keep the baby despite her fears that it might be bipolar like her mother and brother. Neela and Kovač help a religious teenager weigh all her pregnancy options, but differ on what course she should take. Clemente's past is starting to catch up with him as police visit to investigate a missing person report on Jodie. Weaver falls on the ice and realizes she needs surgery.

The episode was rated 7.65 from 81 votes.

Pratt gets to work in Darfur, but soon finds his eyes opened to the need all around him. Debbie attempts to persuade Dakarai to seek treatment for his illness. Carter, Pratt and Dakarai find themselves in the middle of the conflict when a man and his pregnant wife arrive at the camp needing treatment, with trouble not far behind. Events force Pratt and Dakarai to make a dangerous journey.

The episode was rated 7.71 from 69 votes.

With Luka eager to get home, Clemente AWOL and Kerry temporarily off her feet, Dubenko volunteers to cover the ER briefly, but quickly becomes overwhelmed. Abby’s excitement over her pregnancy means no sleep for Luka, and they head out for a bit of early shopping, and some dressing-room fun. Neela gets surgery as an elective, but is shocked to learn that rather that finishing his training in the US, Michael plans to return to Iraq. Ray helps Zoe escape to live with her sister when she arrives in the ER after a beating by her father, and Pratt fakes a blood test to help Darnell avoid arrest.

The episode was rated 7.73 from 67 votes.

Weaver must make a difficult choice about having hip replacement surgery when the pain interferes with her work. Ultimately she decides to go forward with it, and asks Abby to take care of Henry if something goes wrong. When Abby discovers that one of her patients has contracted meningococcemia, the E.R. is briefly quarantined. Sam treats a man who collapsed, Richard Elliott, who offers her an intriguing job. Meanwhile, Neela decides to attend a support group for military spouses. Pratt confesses to Kovač that he falsified a blood test; an infuriated Kovač suspends him for five days.

The episode was rated 7.76 from 72 votes.

An unexpected visitor -- Jodie's violent policeman husband Bobby, from whom she has filed for divorce -- puts Clemente in the middle of a domestic dispute that ends in Bobby shooting Jodie and Clemente. Kovač and Abby await important test results regarding their baby. Neela struggles with her surgical elective, and Ray tries to convince a homeless musician to accept help from his family. Jodie survives life-threatening surgery but is comatose, and her out-of-context remarks lead to Clemente being suspected in her shooting.

The episode was rated 7.81 from 70 votes.

It’s a seemingly ordinary day with the usual collection of patients. But soon, the day becomes anything but ordinary as two prisoners intent on escape come to the ER for treatment, along with a hidden conspirator. Luka discovers them and is injected with a paralytic and they force Sam to become a tool in their plan. Soon, gunshots ring out, a staff member’s life is in jeopardy. The medical staff rush to the aid of the injured and Abby collapses just outside a trauma room where Luka is tied to a gurney.

The episode was rated 7.94 from 87 votes.

Dr. Nate Lennox, a former professor and mentor of Abby's, is brought into the ER in the last stages of ALS disease. In a series of flashbacks at County, the progression of his illness over the last six years is shown. He wants to give up, but Abby is determined to give him the strength to keep fighting.

The episode was rated 8.05 from 65 votes.