ER

Dr. Carter, Abby and other staff members are quarantined as the Centers for Disease Control and Prevention probe a mysterious and deadly outbreak.

The shutdown of another hospital floods the ER with patients; Dr. Pratt resuscitates a heart-attack victim who had been pronounced dead.

A patient pulls a gun on Dr. Chen and other staff members, prompting Dr. Carter to lead a walkout when his request for metal detectors is delayed; Dr. Kovac treats an HIV-infected boy whose parents spark his curiosity.

Gallant resents the unfeeling treatment afforded an elderly patient; Carter discovers Abby drank alcohol while out with friends; Kovac flirts with a young patient's mother.

Dr. Corday operates on a man who has a flesh-eating infection; Pratt takes offense at some of the Halloween costumes he sees in the ER; a new surgical intern (Don Cheadle) has a daunting physical handicap.

Dr. Corday clashes with the new surgical resident (Don Cheadle) over a patient's treatment; Abby wonders about her brother's (Thomas Everett Scott) erratic behavior.

Drs. Carter and Chen treat a frightened nanny who may have been impregnated by her employer; doctors frown on a new resident's (Don Cheadle) bedside manner.

Abby searches for her AWOL brother (Thomas Everett Scott), who may have bipolar disorder, and meets with their mother (Sally Field) to prevent his court-martial.

Abby's mother (Sally Field) interferes with Eric's (Thomas Everett Scott) treatment; Dr. Pratt treats a young patient with a terrible secret; a baby is abandoned in the emergency room.

Events unfold from end to beginning in a special episode; Dr. Kovac's car hits another on an icy road; the ER staff treats belligerent elves and a female hockey player who has a head wound.

Dr. Pratt brings a gun into the emergency room; Weaver tries to conceal her pregnancy; a woman (Sofia Milos) schemes against her dying husband; Chen treats math students who overdosed on a stimulant.

Dr. Weaver is in a difficult situation when an influential alderman tests positive for syphilis; Dr. Carter is impressed when he meets a man (Ed Asner) who runs an inner-city clinic.

Dr. Pratt's disabled roommate leads him to a wounded robber; Carter decides to practice medicine in Africa; a doctor (Bruno Campos) makes a pass at Corday.

Abby learns her troubled brother is missing; an automobile strikes a crowd of teenage girls; an alderman (Bruce Weitz) gives Dr. Weaver a promotion; Lewis looks forward to a blind date.

Abby comes close to a breakdown while dealing with her mother (Sally Field); Pratt accompanies paramedics; Weaver confronts the man who stole her purse; Lewis has a teenage admirer (Patrick Fugit).

The police question Drs. Pratt and Gallant in regard to a rampage at the diner near the hospital; Dr. Lewis befriends a teenage cancer patient (Patrick Fugit) who is smitten with her.

Dr. Weaver bends the rules to treat Alderman Bright's lover for syphilis; Kovac's patient says she was sexually abused at a boot camp for wayward youths; Carter treats a middle-aged woman with a nasty disposition.

Dr. Romano seizes control of the emergency room and offends nearly everyone; Kovac enlists Corday's help in his quest to bring a sickly Croatian boy to the United States for medical attention.

A psychotic patient threatens Abby; Dr. Weaver suspects a woman poisoned her own baby; Dr. Romano continues to make rash judgments.

Carter tries to prevent a grieving gang member from seeking vengeance; Kovac races against the clock to save a Croatian boy's life; a baseball player receives treatment for a heart ailment.

The night and day shifts of Drs. Pratt and Carter; a burned firefighter, poisoned cult members and a wounded gang-member cause frustration amongst the doctors during a solar eclipse.

Drs. Carter and Kovac vaccinate people at an outpost in Congo, where they find themselves in the line of fire between warring factions.