8.4/10573 votes#1 - Chaos Theory
Season 9 Episode 1 - Aired 9/26/2002
Dr. Carter, Abby and other staff of the ER are quarantined as the CDC investigate a mysterious, deadly outbreak.
Director: Jonathan Kaplan
Writer: Jack Orman, R. Scott Gemmill
7.6/10352 votes#2 - Dead Again
Season 9 Episode 2 - Aired 10/3/2002
After another hospital shuts down, the ER is flooded with patients. Dr. Pratt resuscitates a heart-attack victim who had been pronounced dead.
Director: N/A
Writer: Dee Johnson
7.8/10383 votes#3 - Insurrection
Season 9 Episode 3 - Aired 10/10/2002
Dr. Carter leads a walk-out of staff protesting lack of security in the ER.
Director: Charles Haid
Writer: Jack Orman, Yahlin Chang
7.5/10360 votes#4 - Walk Like a Man
Season 9 Episode 4 - Aired 10/17/2002
Weaver makes a mistake on live television while demonstrating flu shots, inadvertently sticking two reporters with the same needle. In the bathroom later, Susan and Abby catch Weaver in a stall with a needle. Weaver confesses to Susan that she's taking hormones. Carter, assuming Susan knows already, tells her about Abby's drinking problem. Abby becomes nurse manager, and argues with Carter about her drinking. Luka flirts with a patient's mom and is caught emerging from a storage closet with her. Gallant has a rough day: Pratt butts in on a patient of his, and Stella Willis dies because Kayson didn't bother with thorough treatment.
Director: Félix Enríquez Alcalá
Writer: David Zabel
7.8/10412 votes#5 - A Hopeless Wound
Season 9 Episode 5 - Aired 10/31/2002
On a busy Halloween night, Carter and Abby are the only staffers in costume when victims of an apartment building fire pack the ER. Corday takes on a new med student for a surgical rotation - Paul Nathan, who suffers from Parkinson's disease and decided to pursue medicine after being diagnosed. Despite a difficult first day, both professionally and medically, Nathan makes a difficult diagnosis. Romano's rehab lags behind his expectations, and he begins to doubt his role in surgery is no longer an option.
Director: Laura Innes
Writer: Joe Sachs
7.6/10361 votes#6 - One Can Only Hope
Season 9 Episode 6 - Aired 11/7/2002
Corday clashes with new surgical resident Paul Nathan regarding his intervention into the treatment of a sickly young woman, Alison, who has signed a "do not resuscitate" order. Abby wonders about the erratic behavior of her visiting brother Eric, and feels conflicted over a nurse's official complaint against Kovac, Abby's former lover. Meanwhile, Pratt comforts Chen after a patient threatens her, and Corday suspects that an unconscious, 14-year-old female patient has been sexually assaulted.
Director: Jonathan Kaplan
Writer: Bruce Miller
7.5/10357 votes#7 - Tell Me Where It Hurts
Season 9 Episode 7 - Aired 11/14/2002
Abby fears the worst when her brother Eric suddenly disappears. Carter and Chen treat a frightened Chinese immigrant nanny, Tong-Yi, whom they suspect was impregnated by her employer. Meanwhile, new surgical resident Paul Nathan, who is struggling to overcome a physical disability, tries to help in the emergency room—but his fellow doctors do not appreciate his advice to patients. Unable to quench his sexual appetites, Kovac also gets into trouble in his professional life, despite his admirable resolve to find an eye specialist to treat a young gunshot victim. Gallant and fellow medical student Erin Harkins engage in an escalating competition of medical knowledge. And Weaver gets some much-needed good news.
Director: N/A
Writer: R. Scott Gemmill
8.2/101,487 votes#8 - First Snowfall
Season 9 Episode 8 - Aired 11/21/2002
Abby's family nightmare continues as she and her mother Maggie search for Abby's missing brother Eric, who Abby suspects is suffering from serious mental problems. Meanwhile, Corday treats a family of patients who, while building a snowman, were severely injured after being struck by a truck driver.
Director: N/A
Writer: Jack Orman
7.5/10348 votes#9 - Next of Kin
Season 9 Episode 9 - Aired 12/5/2002
Abby is distressed when her mother interferes with Eric's treatment at a psychiatric hospital. Pratt treats a frightened young girl who has been injured in an auto accident and desperately wants to hide a secret. An unhappy Luka forms an unlikely bond with a lonely elderly woman who makes him a surprising offer. Chen is overcome with upsetting memories when a baby is abandoned in the emergency room. Pratt takes action after Leon is fired from his menial job.
Director: Paul McCrane
Writer: Dee Johnson
7.6/10405 votes#10 - Hindsight
Season 9 Episode 10 - Aired 12/12/2002
Dr. Kovac's speeding causes a crash on an icy road. The ER staff treats angry elves and a female hockey player with a head injury.
Director: David Nutter
Writer: David Zabel
7.6/10362 votes#11 - A Little Help From My Friends
Season 9 Episode 11 - Aired 1/9/2003
Dr. Pratt brings a gun into the ER; Dr. Weaver tries to conceal her pregnancy; a woman plots against her dying husband; Dr. Chen treats math students who overdosed on an unknown stimulant.
Director: Alan J. Levi
Writer: N/A
7.4/10351 votes#12 - A Saint in the City
Season 9 Episode 12 - Aired 1/16/2003
Dr. Weaver is in a difficult situation when an alderman tests positive for syphilis. Dr. Carter is impressed when he meets a man who runs an inner city clinic.
Director: Peggy Rajski
Writer: Bruce Miller
7.6/10346 votes#13 - No Good Deed Goes Unpunished
Season 9 Episode 13 - Aired 1/30/2003
Dr. Pratt's disabled roommate leads him to a wounded thief. Dr Carter decides to practice medicine in Africa. A doctor makes a pass at Dr. Corday.
Director: Alan J. Levi
Writer: N/A
7.4/10341 votes#14 - No Strings Attached
Season 9 Episode 14 - Aired 2/6/2003
Abby's troubled brother is missing. A car runs into a crowd of teen girls. The alderman with syphilis gives Dr. Weaver a promotion. Dr. Lewis looks forward to a blind date.
Director: Jonathan Kaplan, Peggy Rajski
Writer: Bruce Miller
7.7/10349 votes#15 - A Boy Falling Out of the Sky
Season 9 Episode 15 - Aired 2/13/2003
Abby comes close to breaking down trying to deal with her mother. Dr. Pratt goes for his required paramedic ride-along. Dr. Weaver confronts the man who stole her purse. Dr. Lewis has a teen admirer.
Director: Charles Haid
Writer: R. Scott Gemmill, Yahlin Chang
7.8/10371 votes#16 - A Thousand Cranes
Season 9 Episode 16 - Aired 2/20/2003
The police question Drs. Pratt and Gallant about a rampage at the diner across from the ER. Dr. Lewis befriends her teen admirer, a cancer patient.
Director: Jonathan Kaplan
Writer: N/A
7.7/10339 votes#17 - The Advocate
Season 9 Episode 17 - Aired 3/13/2003
Dr. Weaver bends the rules and treats the Alderman's lover for syphilis. Dr. Kovac's patient claims she was sexually abused at a boot camp for troubled youth. Dr. Carter treats a women with a nasty personality.
Director: Julie Hébert
Writer: Joe Sachs
8.0/10361 votes#18 - Finders Keepers
Season 9 Episode 18 - Aired 4/3/2003
Dr. Romano seizes control of the ER and manages to offend everyone. Dr. Kovac asks Dr. Corday's help in the quest to bring a sickly Croatian boy to the U.S. for medical treatment.
Director: N/A
Writer: Dee Johnson
7.9/10342 votes#19 - Things Change
Season 9 Episode 19 - Aired 4/24/2003
A psychotic patient threatens Abby. Dr. Weaver suspects a woman poisoned her own baby. Dr. Romano continues to make rash judgments.
Director: N/A
Writer: R. Scott Gemmill
7.6/10344 votes#20 - Foreign Affairs
Season 9 Episode 20 - Aired 5/1/2003
Dr. Carter tries to prevent a grieving gang member from going after vengeance. Dr. Kovac races against time to save a Croatian boy's life. A baseball player gets treatment for a heart problem.
Director: Jonathan Kaplan
Writer: David Zabel
8.1/10409 votes#21 - When Night Meets Day
Season 9 Episode 21 - Aired 5/8/2003
Carter's day shift and Pratt's night shift (his final shift at County) are intercut. Both men have extremely busy days. Doc Magoo's burns down. Luka calls Carter from the Congo and asks for help. Carter decides to go. Pratt decides to stay at County. In other parts of the hospital, Romano has his now-useless left arm amputated.
Director: N/A
Writer: Jack Orman
8.4/10489 votes#22 - Kisangani
Season 9 Episode 22 - Aired 5/15/2003
Carter travels to the Congo after Luka calls and asks for help. During the course of his two weeks there, he learns how much different the conditions are against what he's used to. Luka decides to stay for a while as Carter heads back to Chicago, ending up at a sleeping Abby's bedside.
Director: Christopher Chulack
Writer: John Wells
The Best Episodes of ER Season 9
Every episode of ER Season 9 ranked from best to worst. Discover the Best Episodes of ER Season 9!
ER explores the inner workings of an urban teaching hospital and the critical issues faced by the dedicated physicians and staff of its overburdened emergency...
Genre:Drama
Network:NBC
Season 9 Ratings Summary
"Chaos Theory" is the best rated episode of "ER" season 9. It scored 8.4/10 based on 573 votes. Directed by Jonathan Kaplan and written by Jack Orman, R. Scott Gemmill, it aired on 9/26/2002. This episode is rated 0.8 points higher than the second-best, "Dead Again".