Dr. Greene tries to get a congestive heart failure patient with Down's Syndrome onto a heart transplant list. Carter disagrees with a diagnosis by Anspaugh. Carol agonizes over whether to take the med school admittance exam. Jad Houston returns to the ER, old enough to decline emergency care. Greg and Jeanie agree to continue seeing each other.

The episode was rated 7.70 from 116 votes.

Carol takes an interest in an ailing police sergeant who's hiding a degenerative ailment. She also meets with a newspaper reporter to air the complete story on her fatal mistake and is subsequently suspended. Peter runs into a pregnant Carla, upsetting the rest of his day. Carter, already fed up with Benton's lackluster attitude, accepts a transfer to Hicks' team after Peter fails to show up at a lecture the two were to give. Jeanie and Greg Fischer disagree on whether to inform a patient's spouse that he's suffering from neurosyphilis. Weaver and Mark each take a trio of prospective students through a day in the ER, with widely differing results. Chuny and Mark break up; however, he has another date by the end of the day.

The episode was rated 7.70 from 125 votes.

Carter goes behind Anspaugh's back to get a gambler admitted for surgery, earning Anspaugh and Hicks' wrath and jeopardizing his residency. Carol clashes with Doyle, angered that a 25-year-old intern is able to order her around. Peter illegally obtains Carla's ultrasound to look for abnormalities. Doug treats an ill teenager who doesn't want to miss her prom. Greene deals with a patient who feigns symptoms because she likes having surgeries. Jeanie faces her feelings towards Al when she cares for a remorseful AIDS patient who infected her child. Jerry hits on a way to make money from a sperm bank: pass himself off as "Dr. Markovic."

The episode was rated 7.71 from 115 votes.

A gleeful Carter removes Benton's appendix. Dr. Ross treats a 17-year-old cystic fibrosis patient who wants to die, but isn't old enough to sign a DNR. Mark juggles dates with three women, including psychiatrist Nina Pomerantz. Jeanie and Greg team up to find the culprit behind a rash of staph infections. Haleh has a tough time filling Carol's shoes.

The episode was rated 7.77 from 124 votes.

Susan's last day in the ER finds Mark unsure of himself. Despite Doug's urgings, Mark still finds himself afraid to admit his feelings for her. He chases her all over the city until he finds her at the train station. He declares his love for her, but she decides to leave for Phoenix anyway. Grabarsky and Lydia finally get married. Carol agrees to become "management" in exchange for an end to the policy of floating ER nurses elsewhere. Al Boulet delivers divorce papers to Jeanie. Doyle calls the cops on a pregnant woman who is piss drunk, trying to kill her unborn baby. On Healthmobile duty again, Doug meets a young girl named Charlie.

The episode was rated 7.77 from 119 votes.

Mark examines his prejudices when he's accused of neglecting a black gunshot victim, Kenny Law, in favor of a white victim. Jeanie discovers Peter's impending parenthood when Carla comes into the ER. Carter spends the entire day treating a hopeless case. Kerry tries to persuade a disabled junkie to enter a rehab program. Carol treats a college student who was drugged with roofies. After Jenn's mother has a stroke, Rachel comes to stay with Mark for a while.

The episode was rated 7.79 from 115 votes.

Mark, still reeling from Susan's departure, crosses ethical lines to obtain Jeanie's confidential files after learning Al is HIV-positive. Benton rides Gant hard. Carter and Keaton find it harder to maintain their secret relationship.

The episode was rated 7.81 from 120 votes.

Mark and Susan take to the air for helicopter flight rotation, which brings to the ER an entire family injured in an accident. Benton's overconfidence in Keaton's absence results in a dire mistake. Carol deals with a "floater" nurse who can't cope with the speed of the ER. Jeanie and Maggie are given the task of keeping a dead man on ice in anticipation of cryogenic storage.

The episode was rated 7.81 from 120 votes.

Carter blames Benton for Gant's death. An overmatched Carol makes a fatal mistake when the nursing staff is on a sick out. Jeanie dates infectious disease specialist Greg Fischer. Mark and Chuny continue their relationship. Dr. Ross tries to help a non-cooperative Charlie.

The episode was rated 7.82 from 127 votes.

Mark returns to work, scarred both physically and emotionally. Carla goes in labor again, four weeks prematurely, and delivers a baby boy. Doug thwarts Carol's efforts to quietly celebrate her birthday. Carter begins to doubt that his future lies in surgery.

The episode was rated 7.82 from 118 votes.

A long, cold night finds ER staffers with hours of time to kill. Kerry recruits staffers to participate in a study on sleep deprivation combined with physical activity. Gant appeals to Anspaugh after a public scolding from Benton. Carter ditches Dennis again to escape his whining, only to discover deadly results. Peter is denied a recommendation from Keaton one last time before she leaves for Pakistan. Mark and Chuny discover that they have a lot in common. Carol is at a crossroads when management demands she cut two RNs. Charlie comes into the ER severely beaten.

The episode was rated 7.85 from 126 votes.

Rumors sweep the ER when Kerry and Mark cloister themselves to discuss policy regarding HIV-positive employees, prompting Jeanie to publicize her illness. Charlie brings the child she has been caring for into the ER. Doug treats the cihld and feels obligated to report the child's mother for neglect. Doyle treats an abused woman, and conspires to help her escape her husband. Carter blows off an evening with Gant to spend the night with Keaton. Mark inherits a mangy dog from a patient and gives it to Rachel for Christmas. Carol and her mother host a Russian holiday celebration, to which Doug takes Charlie.

The episode was rated 7.85 from 113 votes.

Mark, still recovering from the attack, vents his emotions in a violent fit in the break room and buys a gun for protection. Carter decides his future lies in emergency medicine, not surgery, and tries to convince an irate Anspaugh likewise. Drs. Ross and Del Amico work together when Charlie is brought back into the ER. Peter's child strengthens. Doug and Carol share a kiss. Jeanie and Al are back together.

The episode was rated 7.86 from 124 votes.

Carol is held hostage in a bungled convenience store robbery. Her medical skills are put to their toughest test as she works feverishly to save the gravely wounded store owner.

The episode was rated 8.03 from 128 votes.

The staff springs into action when Dr. Greene is violently beaten by an unknown assailant. Dr. Ross treats the son of a wealthy man, leading Carol to suspect Doug of giving the child special treatment. Greg demands that Jeanie choose between him and Al. Speculation runs rampant when a torrid novella, author unknown, is found at the admit desk. A new pediatrician arrives from Philadelphia. Olbes shows up out of uniform for a change, bringing in her grandfather, who has suffered a stroke. Carla is admitted to the hospital after she goes into premature labor; the contractions are stopped for now.

The episode was rated 8.05 from 119 votes.