ER

ER was an Emmy Award-winning American television drama created by Michael Crichton for NBC. It centered around the lives of emergency room doctors and nurses in a Chicago hospital.

After fifteen years, the long-running medical drama end on April 2, 2009. Several episodes leading up to the series finale featured former cast members such as George Clooney, Anthony Edwards, Noah Wyle, Julianna Margulies, Eriq La Salle and Maura Tierney.ET: George Clooney's ER Fate Revealed (January 21, 2009)MSN: George Clooney's final ER... (February 26, 2009)

During the series finale, Marilu Henner played one of the last patients admitted into the ER.TV Guide: ER Admits Last Patient (April 1, 2009) While another storyline in the finale was based on executive producer John Wells' real life experience. Wells' niece, 17-year-old Shelby Lyn Allen, died of alcohol poisoning in December 2008.Fox News: Finale Based on Death of Producer's 17-Year-Old Niece (April 2, 2009)

In 2009, the 15th season marked the end of the longest running television shows. While the cast changed over the years and a few storylines occurred very far away from the Chicago emergency room, the majority of the episodes featured the drama and interactions that occur between the doctors, patients and nurses in County General Hospital.

ER was NBC's second longest-running drama. Law & Order is still on the air and in its 18th season in 2009.TV Jots: Law and Order... (January 2, 2008)

During the final season, former cast member Eriq La Salle returned to ER to direct an episode as well as reprise to his role as Dr. Peter Benton in several guest appearances.Variety: Eriq La Salle to direct ER Episode (November 4, 2008) He has directed episodes of Law & Order: SVU and Without A Trace. La Salle starred in the show from 1994-2002.Variety: Eriq La Salle to direct ER Episode (November 4, 2008)

• Angela Bassett as Dr. Cate Banfield
• John Stamos as Dr. Tony Gates
• Linda Cardellini as Nurse Samantha Taggert
• Scott Grimes as Dr. Archie Morris
• David Lyons as Dr. Simon Brenner
• Parminder Nagra as Dr. Neela Rasgotra

• Shane West as Dr. Ray Barnett
• Laura Innes as Dr. Kerry Weaver
• Sherry Stringfield as Dr. Susan Lewis
• Noah Wyle as Dr. John Carter
• Anthony Edwards as Dr. Mark Greene
• Michael Michele as Dr. Cleo Finch
• Julianna Margulies as Nurse Carol Hathaway
• George Clooney as Dr. Doug Ross
• Maria Bello as Dr. Anna Del Amico
• Alex Kingston as Dr. Elizabeth Corday
• Eriq La Salle as Dr. Peter Benton
• Goran Visnjic as Dr. Luka Kovac
• Maura Tierney as Dr. Abby Lockhart
• Mekhi Phifer as Dr. Gregory Pratt