Grey's Anatomy is an American medical drama television series that follows the lives of interns, residents and their mentors in the fictional Seattle Grace-Mercy West Hospital in Seattle, Washington. The pilot episode, "A Hard Day's Night" premiered on March 27, 2005 on ABC. Since then, six seasons have aired. The show has been renewed for a seventh season. Season seven will begin airing on September 23, 2010.
The show has attained commercial success and critical acclaim. Initially airing as a midseason replacement for the legal drama Boston Legal, it gained high viewership, with the first episode watched by 16.25 million viewers, and the first season finale attracting 22.22 million viewers. Winner of two Emmy Awards and two Golden Globe Awards, the show is one of the most watched prime time television series.