Grey’s Anatomy’ EP Meg Marinis on the Season 21 finale: that breakup, Meredith's return to Seattle, the explosion — and whether Sandra Oh will return.

On the season finale of "Grey's Anatomy," an ordinary day at Grey Sloan takes an unexpected turn when a medical emergency unfolds in the operating room, endangering lives inside the hospital.

"Unless you saw them, I don't think we can say anyone is necessarily safe," she tells The Hollywood Reporter about the seemingly deadly final moments of season 21.