Grey's Anatomy is about to reveal Derek Shepherd's fourth sister
Get ready, McDreamy fans. Apparently, there’s another Shepherd out there who’s about to arrive in Seattle.
EW has confirmed that Grey’s Anatomy is on the lookout for an actress to play Kathleen, the fourth sister of the late Derek Shepherd (Patrick Dempsey). She will be introduced in a season 15 episode that will revolve around Amelia (Caterina Scorsone), one of Derek’s siblings. The other sisters who have appeared in the past are Liz (Neve Campbell) and Nancy (Embeth Davitz).
The existence of Kathleen, a.k.a. Kate, was first mentioned in season 3. TVLine was first to report the news.
There’s not much more to say about Kathleen other than she, like her sissies, has her doctorate. But she’s a psychiatrist.
Grey’s Anatomy airs Thursdays at 8 p.m. ET on ABC.
