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Grey's Anatomy Sneak Preview Clips: A WHAT Transplant?!

Last year, we met the distinguished Harper Avery, grandfather of Jackson. Now, Debbie Allen comes to Grey's Anatomy this Thursday as Jackson's mother, and it doesn't take her long to make a splash.

Impressing Catherine Avery, who arrives to perform a groundbreaking transplant surgery - you'll have to see the first clip below to see what that entails - becomes a high priority for the scrambling surgeons.

Who will thrive? Did Jackson really encourage Lexie to leave town to avoid a run-in?

Meanwhile, Arizona and Alex find their hands tied with a confidentiality issue when a familiar patient comes into the ER, Bailey's love triangle intensifies, and Meredith tries to hold out hope for Z's return.

Take a look at the sneak peeks from "Love, Loss and Legacy" and comment below:
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