'Grey's Anatomy' Reveals Another Major Return in Season 17: Who Could It Be?

etonline.com:

surprise.With Meredith Grey's (Ellen Pompeo) bout with coronavirus worsening by the minute, the next episode, titled «You'll Never Walk Alone,» reveals that Derek Shepherd (Patrick Dempsey) isn't the one from her past to pay a visit in her beachside dreamscape.

As her life hangs in the balance (literally), a new promo released after Thursday's episode teases that «another person from her past returns.»Meredith, still dressed in a flowy white top and blue jeans, notices a figure — who's never revealed to the viewer — up in the distance. «Excuse me!» she yells, trying to sneak a better at who this mystery person is.Watch the promo for the next episode, airing in two weeks, below.Who could this person be?