“ER” tracks the inner workings of County General Hospital, a Level One Trauma Center where heroic doctors and nurses are faced with life-and-death decisions on a daily basis. The staff is led by Attending Physician Dr. John Carter (Wyle), who, in his eleventh year at County, has risen to a role of respect and moral leadership in the ER. The chief of staff, Dr. Kerry Weaver (Innes), a tough and determined administrator, finds herself at a personal crossroads, trying to strike a balance between her life as a doctor and the life she now wants as a woman.

Also on staff are Dr. Luka Kovac (Visnjic), an ER attending physician from Croatia who is searching – sometimes self-destructively – for something to fill the void of his lost family and failed relationships; Abby Lockhart (Tierney), who recently made the professional transition from nurse to doctor, is making a serious effort to turn her personal life around; Dr. Jing-Mei Chen (Ming-Na), an attending E.R. doc who, having sacrificed so much for her work, is looking to lighten up and get out more; Dr. Susan Lewis (Stringfield), who after a few years away has readjusted to the emergency room and recently had a baby with a man she married in Las Vegas on a whim; and Dr. Gregory Pratt (Phifer), a brash, third-year resident with a checkered background that won’t stop haunting him.

Recent additions to the ER include Neela Rasgotra (Nagra), a British-Indian medical student who arrives in Chicago after finishing her undergraduate degree in biophysics and molecular biology at Yale. Samantha Taggart (Cardellini) is a nurse and spirited single mother determined to save lives in a place where nothing is taken for granted. Dr. Ray Barnett (West) has come aboard as a doctor who would sometimes rather be playing in his band than treating patients. He has a way with the ladies and a knack for making things go smoothly, most of the time.

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