Season 12, Episode 22 Twenty-One Guns
First Aired: May 18, 2006
Chaos reigns in the ER when two prisoners are brought in for treatment, but instead plot a violent escape---and staff members are caught in the middle.
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- Premiered: September 19, 1994
- Rating: TV-14
- Premise: The riveting medical drama that redefined the genre for the 1990s and into the 21st century. Created by author Michael Crichton and set in a Chicago ER, the series chronicles the lives of its harried staff in staccato, realistic scenes of lives saved and l… (more)