Grey's Anatomy Sneak Peek: Derek's Vanishing Act Paralyzes Meredith

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The worrisome disappearance of Derek (Patrick Dempsey) is making Meredith (Ellen Pompeo) go to some dark and twisty places in tonight’s Grey’s Anatomy (8/7c, ABC).

In the exclusive sneak peek above, Mer replays in her head the heart-to-heart she had with Derek on the day he vanished, which is all well and good except her mental check-out occurs while she’s performing surgery on a patient. An annoyed Bailey snaps her out of it, but then unsettles her colleague further when she reminds Mer of the unprecedented bad luck that she and Derek have experienced over the years (plane crashes, drownings, shootings, etc.).

“Is this supposed to make me feel better?!” Mer snaps.

Yep, it is. And it does. As you’ll see when you press PLAY above, there’s a method to Bailey’s madness (isn’t there always?). Watch the clip and then hit the comments with your thoughts/theories about Derek’s whereabouts.