ER is a popular NBC drama primarily set in a teaching hospital's emergency room, the fictional County General (based loosely off Cook County General, a real hospital) in Chicago, Illinois. The first episode, known as "24 Hours" or simply "Pilot", aired in the United States on September 19, 1994.
Current stars of the series include:
- Noah Wyle (Series 1 to present), as Dr. John Carter
- Laura Innes (Series 2 to present), as Dr. Kerry Weaver
- Alex Kingston (Series 4 to present), as Dr. Elizabeth Corday
- Ming-Na (Series 1, 6 to present), as Dr. Jing-mei (Deb) Chen
- Goran Visnjic (Series 6 to present), as Dr. Luka Kovac
- Maura Tierney (Series 6 to present), as Nurse Abby Lockhart
- Sherry Stringfield (Series 1-3, 8 to present), as Dr. Susan Lewis
- Sharif Atkins (Series 7 to present), as Dr. Michael Gallant
- Mekhi Phifer, (Series 9 to present), as Dr. Greg Pratt
- Parminder Nagra (Series 10 to present), as Neela Rasgotra
- Linda Cardellini (Series 10 to present), as Nurse Samantha Taggart
- Anthony Edwards (Series 1-8), as Dr. Mark Greene
- Eriq La Salle (Series 1-8), as Dr. Peter Benton
- Julianna Margulies (Series 1-6), as Nurse Carol Hathaway
- George Clooney (Series 1-5), as Dr. Doug Ross
- Paul McCrane (Series 4-10), as Dr. Robert 'Rocket' Romano
- William H. Macy (Series 1-4), as Dr. David Morgenstern
- Kellie Martin (Series 4-6), as Lucy Knight
- Gloria Reuben (Series 1-5), as Jeanie Boulet
The complete first season of ER was released on DVD on August 26, 2003.