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.

'ER' is celebrated for its compelling drama, realistic hospital portrayal, and strong early-season character development. The ensemble cast, including Anthony Edwards and George Clooney, is praised for balancing drama and humor. Criticisms include key character departures, quality decline, and less likable new characters. Some note inconsistencies in medical accuracy and overly dramatic storylines. Despite these issues, 'ER' is often regarded as a groundbreaking medical drama.