格蕾成功生娃，韦伯触电待救，胖C发现AC出轨情感危机，杨和欧文感情不甚乐观，四月继续纠结小黑。第二代实习医生遇到重大考验，生离死别，真情初现……

实习医生格蕾 第九季

The fifth-year residents return for the first day of a year that will make or break their careers: Meredith faces the consequences of tampering with Derek's clinical trial and is terminated at the hospital; April tries to step up to the plate as Chief Resident in the wake of a giant sinkhole in the middle of Seattle; and Cristina and Owen are still at odds over their drastically different feelings for their unborn child.

The staff tries to deal with physical and emotional trauma in the wake of the deadly rampage.