Meredith in peril! Grey's Anatomy returns from its winter hiatus on February 11 with a tense episode involving an attack by a Grey Sloan patient, as seen in a promo released on Wednesday, January 20.

The footage shows Meredith Grey (Ellen Pompeo), the hospital's chief of general surgery, going about her daily routine when a patient approaches her.

"Let's get back on the bed," Mer says gently.

Suddenly, the person snaps, pushing the doctor against a window with such force that it shatters. The incident ends with Meredith on the floor, unconscious.

The clip then shows her coworkers rushing to her aid as everything around her goes silent.

The crisis comes almost a year after fans were left grappling with Derek Shepherd's (Patrick Dempsey) shocking death from a car crash in an April 2015 episode.

To see her fellow doctors' reactions to the scary situation, watch the clip above.

Grey's Anatomy's 12th season returns on ABC on Thursday, February 11, at 8 p.m. EST. 

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