Jackson Avery and Meredith Grey have reunited at Grey Sloan Memorial.

E! News' exclusive first look at Grey's Anatomy 's Oct. 30 episode shows Jesse Williams making a highly anticipated return to medical drama for a tense scene alongside Ellen Pompeo 's Meredith Grey in season 22.

In the new clip, Meredith confronts Jackson about a troubling study performed by Tom Koracick ( Greg Germann ), a fellow former Grey Sloan Memorial surgeon who published misleading Alzheimer’s research findings.

"He only studied male mice," she says of the befuddling case in the teaser. "I did the same experiment with female mice and when I gave them antibiotics there was no decrease in Alzheimer's. So now, since he's gone public, people will assume that what's true for male mice is true for all

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