About Grey's Anatomy Season 4, Episode 17 : Freedom (2)

Callie confronts her feelings about Erica, 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. Guest Stars: Jurnee Smollett, Loretta Devine, Amy Madigan, Lauren Stamile, Sterling Knight, Elizabeth Reaser, John Cothran,