Vanessa Marquez

In the 12th season premiere, Sam and Kovac report to the police that her diabetic son, Alex (recurring guest star Dominic Janes), is missing and is possibly trying to find his father. The boy mistakenly thinks his dad is in Colorado, but the man is actually incarcerated. Unfortunately, Alex left without his insulin. And Neela, Ray and Abby struggle with their first shifts in charge of the new interns.

Alison is arrested for drunk driving after hitting a boy. She then unsuccessfully tries to win back Billy, but she's more lucky in court. Jane gets $500,000 for a business expansion.

Second year residents Abby Lockhart, Neela Rasgotra and Ray Barnett have now become the teachers. And Dr. Archie Morris (Scott Grimes) realizes he makes a better manager than a doctor. Dr. Pratt resolves issues with his family through his estranged father (Danny Glover), while a new attending doctor (John Leguizamo) poses as a patient to test the knowledge of the ER staff, causing friction with Dr. Kovac that leaves Abby caught in the middle.

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 room.

For the overburdened doctors and emergency room personnel of County General Hospital, an urban Chicago teaching hospital, the difference between life and death often depends on split-second decisions. The staff of heroic healers includes Attending Physician Dr. John Carter (Noah Wyle), nurse Abby Lockhart (Maura Tierney), Attending Physician Dr. Luka Kovac (Goran Visnjic), Chief of Staff Dr. Kerry Weaver (Laura Innes), intern Dr. Gregory Pratt (Mekhi Phifer), recent medical school graduate Michael Gallant (Sharif Atkins), Attending Physician Dr. Jing-Mei Chen (Ming-Na), Attending Physician Dr. Susan Lewis (Sherry Stringfield), Chief of Emergency Medicine Dr. Robert Romano (Paul McCrane), trauma surgeon Dr. Elizabeth Corday (Alex Kingston) and newcomer Neela Rasgotra (Parminder Nagra), a British-Indian medical student.

The first season of ER proves the strength of its storytelling and stellar ensemble cast. From exploring personal problems outside of Chicago's County General Hospital to the political issues being raised inside, the drama is nothing short of intense.

It's always rush hour at Chicago's County General. Every day...every moment...brings new challenges, new triumphs and new losses. But no one ever expected that one of those losses would include one of the ER's talented med students. The pulse-pounding rotation continues with all 22 episodes of ER's sixth sensational season.

How do you separate your personal life from your professional life? Not easily. And if you're on the emergency room staff of Chicago's County General Hospital, it may be impossible. As a third-year resident, former nurse Abby Lockhart asserts her authority in the ER, but the stress and complications of raising a child cause a rift between her and Dr. Luka Kovac. And while Chief of Staff Kerry Weaver remains determined at work, she finds herself at a personal crossroads as both a woman and a mother.

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 room.