Meredith and Derek was confirmed by S. Rhimes that they will both survive the crash in the season 8 finale of Grey's Anatomy. However, when the series returns on Sept. 27 the couple are gonna have to face the consequences that the crash tied along -- Lexie's death, Derek's hand injury and ofcourse, the whole trauma that the catastrophe entails.
Furthermore, TV Guide was able to get an insider scoop about this matter. Let's hear it from no other than Meredith Grey herself, actress Ellen Pompeo.
"They're OK because they survived the plane crash, so they're happy to be alive," Ellen Pompeo tells us. The bad news is that Derek's injury will lead to some trying times. "I don't know if his hand will ever fully be recovered. She'll do what you have to do as a partner; you have to support your partner."
Source: TV Guide