The complete fourth season of the award-winning US drama following the lives of medical professionals at the fictional Seattle Grace Hospital. In this season, Meredith (Ellen Pompeo), Cristina (Sandra Oh), Alex (Justin Chambers) and Izzie (Katherine Heigl) become residents while George (T.R. Knight) has to repeat his intern year. The episodes are: 'A Change Is Gonna Come', 'Love/Addiction', 'Let the Truth Sting', 'The Heart of the Matter', 'Haunt You Every Day', 'Kung Fu Fighting', 'Physical Attraction... Chemical Reaction', 'Forever Young', 'Crash Into Me: Part 1', 'Crash Into Me: Part 2', 'Lay Your Hands On Me', 'Where the Wild Things Are', 'Piece of My Heart', 'The Becoming', 'Losing My Mind' and 'Freedom'.