Expect more competition, more doctors and much more drama as Seattle Grace merges with a competing hospital in Grey's Anatomy's celebrated sixth season. Relive every gripping moment in this sensational 6-disc set! Meredith, Derek, Izzie, Cristina and the rest of your favorite characters face a brand-new challenge with the arrival of the doctors from Mercy West. Battle lines are drawn and rivalries reach new heights in an unforgettable year at Seattle Grace. Commit yourself to one of primetime's most popular shows, complete with bonus features - including an extended finale with over 20 minutes of never-before-seen scenes, available only on DVD.