ER

Abby, Pratt and Morris try to figure out how to handle Dr. Moretti's strict new ER procedures; Gates frantically tries to find out what happened to Neela; Gates finds out that a patient was responsible for the explosion at an anti-war rally.

Dr. Moretti continues to institute new measures that cause many of the ER doctors to despise him.

When a teenage wrestler comes into the ER with severe vomiting, Pratt discovers that the cause of the problem is very serious; Gates tries to help a child with a deadly disease; two volunteer police officers come in with gunshot wounds.

A former patient decides to provide free beauty treatments in the ER; Joe visits the ER after a fall from a jungle gym; Gates makes a terminally ill boy's baseball dream come true.

Moretti (Stanley Tucci) decides that Gates is ready to return to the ER; Neela must mentor a young genius intern (Steven Christopher Parker); Morris has a hard time resisting women while Hope is away.

Morris and Pratt cram for their medical boards when Moretti brings in a new attending physician to help with the load; Sam and Abby work on an attention-hungry patient who comes into the ER with elusive symptoms.

Rolling brownouts hit Chicago; Morris buys an energy-efficient car; Abby and Pratt disagree on a fussy baby's diagnosis; with Kovac in Croatia, Abby gives in to temptation.

Gates and Julia nurture their newfound romance, but a troubling phone call interrupts them; the other doctors notice that Abby is off her game; Harold saves the day in a critical situation; Kovac returns a day early.

Abby feels uncomfortable when Luka's brother visits from Croatia; Gates feels the pressures of fatherhood when Sarah decides to host a sleepover; the appointment of a temporary head of the ER upsets Pratt.

Luka and Abby make plans to go to Croatia after his father dies; a man (Peter Fonda) comes to the hospital after his wife's car accident and meets someone from his past; Julia holds a service to bless the ER and patients who have been lost.

Sam finds that she has much in common with a patient; a woman (Gloria Reuben) rushes her son to the ER after he falls in gym class; the hospital higher-ups refuse to take Pratt seriously.

Abby checks out of rehab and finds her way back to the ER; Harold finds new confidence after a big night with Neela's cousin; multiple victims of a fire come in.

Pratt gets cold feet when Bettina (Gina Ravera) gets serious about their relationship; Neela joins a hockey team; a prison doctor visits the ER.

Dr. Brenner refuses to teach the interns; Gates treats a young patient with major heart trouble; Abby considers telling Kovac the truth about her affair as she heads to Croatia; Sam finds out that Gates and Julia have broken up.

Neela makes a quick decision about a patient with a torn aorta; Sarah's grandfather collapses and is rushed to the ER; Gates sends Sam flowers to let her know that he is serious.

Neela finds out the aorta surgery on Sheryl Hawkins (Aida Turturro) has caused an infection; Abby discovers a serious condition while treating a beaten teen; Kovac struggles to forgive Abby for her indiscretion.

Pratt decides to fight for his relationship with Bettina, despite her reluctance; Neela treats a young couple but quickly discovers their criminal status; Abby is afraid her relationship with Kovac is over.

The hospital psychologist works with Morris after his run-in with jewelry thieves; Neela is frustrated when Sheryl (Aida Turturro) needs a fourth surgery for her infection; Abby struggles with a decision when she is offered a new job.

Gates worries that his relationship with Sam is not as serious as he thought; a drunken, mysterious patient (Steve Buscemi) threatens the safety of everyone at County General; Kovac is shocked when Moretti (Stanley Tucci) pays him a visit.