ER (OV)

Greene and Corday contract poison ivy after a romantic outing together. Dr. Chen keeps her pregnancy a secret. Carter finishes a drug rehabilitation program.

Carter encounters Abby at an Alcoholics Anonymous meeting, and, later, Abby reluctantly agrees to serve as his sponsor.

Romano vindictively terminates Benton after being fined for a matter that Benton reported to the county inspector. Abby and Kovac share a kiss.

Benton is unable to find a job after Romano negatively influences local hospitals. He reluctantly agrees to accept Romano's demeaning offer of a per diem job at County with no benefits.

Greene flies in a helicopter to a remote area of Indiana to rescue a heart transplant patient.

Corday rushes through a surgical procedure in order to take off on a romantic weekend with Greene. She is later called back to the hospital after her patient suffers complications.

Tests reveal that Greene has a brain tumor, but he hides the news from Corday. Corday finds out that she is being sued for malpractice. She also reveals to Greene that she is pregnant.

Maggie's emotional instability worsens. She refuses her medication, becomes combative and flees the hospital. Abby finds solace with Kovac.

Chen gives birth, but insists on breastfeeding the infant before she gives it to the adoptive parents.

An overbearing father is guilt-ridden after injuring his son in a car accident. But the accident is a result of the father's undetected heart condition and he undergoes heart bypass surgery.

Benton and Cleo clash over his deceased nephew's girlfriend. They finally agree to call a social worker. Benton confesses his love to Cleo.

Greene returns to work but confuses words and displays uncharacteristic anger. Eager to get out of his per diem situation, Benton agrees to a full time position.

Weaver becomes concerned about Greene's cognitive skills and surrepticiously calls for an official evaluation of his competency. Corday plans her wedding to Greene.

As the new director of diversity, Benton studies medical school applications and discovers that his own academic record did not qualify him--he was admitted because of affirmative action.

In the series' 150th episode, a massive train wreck mobilizes the emergency room doctors. Corday, Carter and Kovac rush to the scene.

Weaver fears for her own reputation when Legaspi is accused of sexual harassment.

A demented patient causes a shootout in the emergency room. After terrorizing people in the ER with a gun, she gets shot by a policeman. She soon dies.

Numerous mishaps threaten to mar Corday and Greene's wedding day.

Abby and Carter travel to Oklahoma to rescue Abby's mentally ill mother (SALLY FIELD) and bring her back to Chicago. In Chicago, Maggie suffers from a sleeping pills overdose.

Maggie contests Abby's attempt to institutionalize her. Weaver treats a few bizarre patients.

Cleo and Carla clash after Reese gets hurt while in Cleo's care. Weaver and Kovac cannot save the life of a developmentally challenged woman's only caregiver.

Cleo breaks a vial of AIDS-tainted blood, which pierces her skin. Carter gives Chen a good peer review and applies for a job elsewhere.