: The episode is praised for its "viscerally unsettling" atmosphere and the way it builds suspense exponentially from the moment the threat is revealed. It transformed the medical drama into a survival thriller, making it clear that no main character was safe.
: A grieving widower, Gary Clark, enters Seattle Grace Mercy West with a firearm, seeking vengeance against the surgeons he blames for his wife's death. [S6E23] Sanctuary
Directed by Bryce Dallas Howard, this episode shifts the series into a "planet-hopping, problem-of-the-week" format. Watching Sanctuary Grey's Anatomy: Season 6, Episode 23 : The episode is praised for its "viscerally