Why is Derek’s sister coming to Seattle Grace on Thursday’s Grey’s Anatomy?

It turns out, each of his sisters were called to possibly donate a live nerve for the surgery on Derek’s (Patrick Dempsey) hand. It looks like Neve Campbell, who will play Derek’s previously unseen sister Lizzie, is the lucky winner!

First Look: Scream‘s Neve Campbell checks into Grey’s Anatomy

So, will Lizzie’s nerve save Derek’s hand? Check out the sneak peek below, which features the Scream alum’s introduction:

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