1. Massachusetts General Hospital
   County General Hospital
2. San Antonio Medical
   Orange County Hospital

County General Hospital was a fictional hospital!

1. Noah Wyle
   George Clooney
2. Goran Visnjic
   Eriq La Salle

Goran Visnjic played the role of Dr. Luka Kovac on ER from 1999 - 2009.

1. George Clooney
   Noah Wyle
2. Anthony Edwards
   Ray Liotta

Clooney earned three Golden Globe Award nominations for Best Actor in a Television Series Drama in 1995, 1996 and 1997 - all times losing to co-star Anthony Edwards!

1. Dr. Peter Benton
   Dr. Doug Ross
2. Dr. Mark Greene
   Dr. Greg Pratt

Anthony Edwards appeared as Mark Greene in 181 episodes of ER

1. Los Angeles
   Chicago
2. Detroit
   San Antonio

Based in Chicago, though mostly filmed in Warner Brothers Burbank Studios in California.

1. Jeanie Boulet
   Sherry Stringfield
2. Laura Innes
   Julianna Marguilies

Carol Hathaway was a nurse at County General Hospital. She held a main role appearing in 132 episodes of ER.

1. Car accident
   Motorcycle accident
2. Heart attack
   Brain tumor

Mark Greene travels to Hawaii to live out his final days, Rachel and Ella go there to be with him too.

1. "Chasing Cars"
   "Over The Rainbow"
2. "How to Save a Life"
   "Hello, Goodbye"

Hawaiian Israel Kamakawiwoʻole plays a beautiful ukulele rendition of "Over the Rainbow" that will forever remind ER viewers of this sad goodbye to Dr. Green!

1. Dr. Robert Romano
   Dr. Luka Kovac
2. Dr. Abby Lockhart
   Dr. Peter Benton

Robert Romano was portrayed by actor Paul McCrane in 107 episodes from 1997 - 2008. He was killed off the show by yet another helicopter accident!

1. Dr. Carter
   Dr. Benton
2. Dr. Romano
   Dr. Morris

Noah Wyle led the cast of ER with the most number of episodes at 254.

1. Abby Lockhart
   Susan Lewis
2. Deb Chen
   Elizabeth Corday

Abby Lockhart put her medical training on hold and became a full-time OB/GYN nurse while her then-husband completed his medical school. Once they divorced, she resumed her training and became a physician in 2000.

1. Alex Kingston
   Judy Parfitt
2. Sally Field
   Maura Tierney

Sally Field appeared in 12 episodes between 2000 and 2006.

1. Abby Lockhart
   Elizabeth Corday
2. Catherine Banfield
   Kerry Weaver

Corday and Greene start dating in Season 5. In Season 7, they get married after finding out that she is pregnant with their daughter Ella.

1. Sarah
   Rachel
2. Samantha
   Sariah

Rachel causes a bit of stress in Dr. Greene's life as she grows into a mischievous teenager throughout the show.

1. Dr. Greg Platt
   Dr. Archie Morris
2. Dr. Tony Gates
   Desk Clerk Jerry Markovic

Mekhi Phifer was on ER from 2002 to 2008. His character died in an explosion in the first episode of the final season.

1. Jerry
   Bobby
2. Greg
   Donald

Jerry Markovic was portrayed by actor Abraham Benrubi. In the later seasons, he was promoted to supervising emergency services coordinator - which required no additional work, just that he wear a tie!

1. Dr. Peter Benton
   Dr. Kerry Weaver
2. Dr. Jing-Mei Chen
   Dr. Elizabeth Corday

It was revealed in Season 11 that Weaver's limp was caused by congenital hip dysplasia.

1. Sean Penn
   Eriq La Salle
2. John Stamos
   Ray Liotta

Best known for being "Uncle Jesse" on Full House, John Stamos appeared as a main character in 65 episodes of ER.

1. Dr. Pratt
   Dr. Benton
2. Dr. Lewis
   Dr. Greene

Reese is born by Benton's former girlfriend Carla Reese. He is born prematurely and after complications, he becomes deaf.

1. Dr. Michael Gallant
   Dr. Greg Pratt
2. Dr. Doug Ross
   Dr. Ray Barnett

Michael Gallant was portrayed by actor Sharif Atkins. He appeared in 60 episodes of ER, his last being "The Gallant Hero & the Tragic Victor" in 2006.

1. Dr. Janet Coburn
   Dr. Daria Wade
2. Dr. Julia Wise
   Dr. Cate Banfield

Angela Bassett appeared in 16 episodes as a main cast member during ER's final season.

1. Dr. Doug Ross
   Dr. Susan Lewis
2. Dr. Greg Pratt
   Dr. Archie Morris

Susan Lewis, played by Sherry Stringfield, began ER as one of the original cast members from 1994 - 1996. She left and later returned in 2001 - 2005, departing the show once again in season 12.

1. Los Angeles
   Africa
2. Indonesia
   Miami

Dr. Carter fell in love and moved to Africa with his new wife Makemba "Kem" Likasu.

1. Lucy Knight
   Dawn Archer
2. Wendy Goldman
   Chuny Marquez

Lucy Knight appeared in 37 episodes from 1998 - 2000 and was portrayed by actress Kellie Martin.

1. Conni Oligario
   Malik McGrath
2. Dawn Archer
   Chuny Marquez

It was revealed in season 14 that Chuny's real name was Ethel!

1. Chaz Pratt
   Chuck Martin
2. Ben Parker
   Malik McGrath

Sam Jones III appeared in 16 episodes of ER as Charlie "Chaz" Pratt, Jr.

1. Dr. Robert Romano
   Dr. Gabriel Lawrence
2. Dr. Dave Malucci
   Dr. Jack Kayson

Kerry Weaver finally gets her chance to fire Malucci when she discovers him having sex in an ambulance with a paramedic.

1. Tanzania
   Democratic Republic of the Congo
2. Egypt
   South Africa

This was a move by producers John Wells to shed light on the situation in the Congo and Darfur.

1. Pratt
   Kovac
2. Benton
   Gates

Abby leaves County General after accepting a position in Boston where she moves to with Luka with their son Josip for a new start.

1. Donate it to the American Red Cross
   Open the Joshua Carter Center
2. Send it all to the Congo
   Starts a trust fund for his future children

The Joshua Carter Center was a medical clinic for the underprivileged. Carter opened it once he became the head of his family foundation per his grandmother's will.