Grey's Anatomy Season 8 Episode 15

In the latest crossover event with Private Practice, Amelia (Caterina Scorsone) is desperate to save Erica's life and arrives at Seattle Grace to beg her brother, Derek, for help with the gliosarcoma case. Meanwhile, Cristina and Owen engage in heated arguments during marriage counseling, and Alex realizes that in order to be a good doctor, he needs to improve his people skills. Better late than never! Meredith is given a chance to shine when a man enters the ER after getting his hand stuck in meat grinder, and the stress levels rise as the residents continue to study for their upcoming oral boards.