Premiering on ABC as a mid-season replacement on March 27, 2005, the show has now aired 22 seasons and over 450 episodes, making it the longest-running medical drama in American primetime television history.
In the early 2000s, television medical dramas were dominated by the gritty, fast-paced realism of ER . Shonda Rhimes took a different approach. She focused on the competitive world of surgical residencies through a distinctly character-driven, emotional lens. the grey-s anatomy