Grey's Anatomy: Season 4, Episode 16

4 - 16: Freedom (1)

Derek and Meredith's relationship is reinstated as the clinical trial comes to a relaxing end. Erica and Callie share an intimate moment, while The Chief will do whatever it takes to get back together with Adele. A boy trapped in cement after a dare has placed his health at risk, leading for the doctors at Seattle Grace to sympathize and ease his pains.