Carol worries about her physics exam while Mark is heart-broken about Susan’s departure and focuses solely on his job.

Mark and Kerry have to create a policy regarding HIV-positive employees, which leads to gossip amongst the nurses.

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…

Carol has to fire two of the nurses. Meanwhile, Gant feels Benton is too hard on him.

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…

Carter feels guilty about Gant’s death. Benton doesn’t want to talk about it.

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…

It’s Susan’s last day. Carol stands up for her nurses when one of them is being rotated to another department.

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…

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.

While Mark is anxious about Susan’s return from her holiday, Doug and Carol ride along with the health mobile.

Dr. Hicks berates Benton when he tries to switch shifts to attend his mother’s birthday party. A teenage girl, a frequent patient of the ER, is brought in for a…

Peter refuses to sleep, despite Hicks’ order, in the middle of a 48-hour shift. His lack of sleep catches up with him when he is supposed to be watching his…

Encouraged by Carol, Mark finally asks Susan out. Benton tries to save a boy, despite the fact Doug thinks he’s brain dead.

Benton makes a critical error when he publicizes the availability of a dying man’s organs before obtaining the wife’s permission. Lewis discovers that Cvetic has quit his job at the…

It’s the first day of Carter’s internship. He has a 36 hour shift and overnight he has to cover the ER, the ICU as well as the surgical patients.

While the whole staff is worried the ER might close, Jeanie has her own problems in dealing with being HIV-positive.

Carter trains one of Benton’s new students, Deb Chen. Hathaway has her hands full with an emotionally challenged patient who’s obsessed with colors. A sociologist provokes people to measure their…

Donald Anspaugh has a new method to increase the staff’s efficiency, new intern Maggie Doyle joins the ER and Susan asks Mark to come along to Hawaii.

Carol’s pregnancy becomes public knowledge as she learns that she’s having twins. Lucy has problems trying to go off Ritalin. Peter learns Carla plans to move to Germany. Kerry finds…

Carter and Benton treat a suicidal transgender woman. Doug feels like a ‘kept man’ in his relationship with Linda Farrell. A patient entrusts Carol with the particulars in an accident….

A severe blizzard leaves the ER utterly devoid of patients, leaving the staff free to goof off. In the middle of their fun, a call comes from dispatch, informing the…

The ER docs tend to three teenagers who were in an accident on the way to their senior prom. Greene and Carter treat the most severely injured, a boy suffering…

The air conditioning quits on the hottest day in October which, coupled with closed ERs in Chicago’s other two hospitals, leads to an extremely hectic day. Dr. Ross treats a…

Benton and Langworthy interview for the Starzl fellowship. A drunk Chloe throws a tantrum in the hospital. Benton saves a man with a throat wound, earning Morganstern’s praise. Carter has…

Greene tries to help Mobalage when he’s about to be deported. Kerry tries to save a woman she believes is her birth mother. Hathaway decides to have Doug’s child. Benton…

Carol returns after her eight week absence, finding Doug holding himself responsible. Carter finds himself watching over a mysterious, mentally ill singing woman. Susan clashes with Dr. Kayson over a…

Greene prepares to bury his father. Chen worries about Carter’s mood swings. After witnessing the interaction between a dying woman and her family, Hathaway realizes she wants her family together…

As the result of a school shooting, Kovac and Benton care for the gunman and his victims. Abby discovers that Carter has been illegally injecting pain relievers. Greene and Weaver…

Carter has a difficult day when he has to identify a dead teenager and notify his parents. It doesn’t help that he notifies the wrong family. Doug woos Carol, despite…

A day’s worth of trauma takes its toll on the men and women of the ER. Dr. Greene looks into leaving the ER and joining private practice. Among other events,…

Carter seeks psychiatric help because he can’t sleep. He then visits the wife of his attacker. Weaver returns to work after her suspension. Hathaway and Kovac share a kiss.

During a paramedic ride-along, Carter is forced to drive the ambulance while fleeing a riot scene and inadvertently runs over a teenage boy. Later, a paramedic is shot by an…

Weaver reprimands Carter for doing a dangerous procedure without consulting Kovac. She also talks to Hathaway about Hathaway’s lack of focus on the job. And while treating a 6-year-old patient…

Dr. Lewis tries to get a mentally disturbed individual admitted to the psych ward. Carter has a difficult day, treating many members of wedding party, suffering from food poisoning. Dr….

Greene assists paramedics in treating injured children at a school bus accident. En route, Doug and Jeanie survive their own accident. Kerry stops Doug from treating Jeanie…or any other patient….

Even though he suffers from intense pain due to his stabbing injuries, Carter returns to work and prescribes a controversial procedure for a suicidal patient. Greene tries to convince his…

Doug faces possible criminal charges after Ricky Abbott dies when Ross bypasses system lockouts to enable Joi to give Ricky a lethal dosage of dilaudin. Doug is delegated to desk…

Kovac witnesses an accident and saves the young victim’s life. Carter slowly recovers from his brutal attack and undergoes excruciating physical therapy. Hathaway helps two sexually active 14-year-old girls.