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| Dr. Green- Mark is Attending ER Physician: Attending resident Dr. Mark Green is a skilled practitoner torn between the bemands of his profession and a personal life that is too often sacridiced. |
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| Dr. Corday- Lizzy is the Associate Chief of Surgey: Dr. Corday is a very gifted surgeon from London who has come to the United States to gain her experience in the violent world of Traum case's. Corday finds herself steeping back to the duties of an intern to remain at County General |
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| Dr. Malucci- Cocky Dave Malucci is a second year resident trying to gain the respect from the staff at County General |
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| Dr.Benton- Attending Physician: The intense Dr. Benton is a very Brilliant surgical trauma fellow and an ardent perfectionist wiht very little tolerance for second-rate work. His relationship wiht Carla and the difficulties involved in rasing their deaf son continue to confound benton as he strives to saty focused on his work |
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| Dr. Kovac- Dr. Luka Kovac is a Croatian physician who moonlights in the emergency room. |
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| Dr. Weaver- Kerry is the chief of Emergency Medicine: Dr. Weaver frist came to the Er as Chief resident, later becoming the attending in the Er. Her unmatched abilities in critical situations have earned her the respect of her colleagues |
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| Abby Lockheart- Lockheart is a medical student who has been demoted to nurse becuse her er-husband delayed her tuition payments. |
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| Dr. Finch- Dr. Cleo Finch is a second-year emergency medicine and pediatrics |
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| Dr.Carter- Resident: Now a senior resident, Dr. John Carter is experiencing all the joys and trials of being a doctor |
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| Dr. Romano- Chief of Staff: A familiar face around County General, adrasive and duplicitous surgon Dr. Romano causes trouble wherever he goes |