Jake Borelli

Owen and Teddy have to deal with the surprise arrival of Megan Hunt, who knows nothing about their situation.

As fog begins to cover Seattle, the doctors must navigate through personal complications. Meredith and Alex attempt to save Gus, and Levi talks some sense into a struggling Nico.

As Meredith debates how to handle an unexpected situation in her personal life, Richard has an untimely reunion with an old friend. Meanwhile, Jo has a hard time at work, and Owen tries therapy.

Alex endures an agonising wait for a severely agoraphobic blood donor to arrive from London to save his patient. Elsewhere, Jo opens up to Meredith.

A sea of patients flood the hospital after gunfire goes off at a parade and a blast from the past throws Maggie off her game on the same day that Meredith tries to talk to her about Deluca. Owen and Amelia get some potentially life-altering news.

Maggie introduces mood rooms as an alternative approach to medicine. Alex and DeLuca butt heads over an 11-year-old patient who tries to sabotage her own surgery.