15 Seisoen
331 Episode
ER - Season 12
- Jaar: 2009
- Land: United States of America
- Genre: Drama
- Studio: NBC
- Sleutelwoord: chicago, illinois, hospital, doctor, surgical operation, emergency room, medical drama
- Direkteur: Michael Crichton
- Gooi: Maura Tierney, Parminder Nagra, Linda Cardellini, Scott Grimes, David Lyons, Angela Bassett