Grey's Anatomy will introduce Derek's fourth sister this season.
According to TV Line, a rep from ABC has confirmed that casting for Kathleen Shepherd is underway, but declined to give further details. Stay tuned!
On Meredith and DeLuca's arc, meanwhile, expect to see the new pairing getting even more closer in the upcoming episodes. Giacomo Gianniotti has shared the news with TV Guide.
"I think we are [going to learn more about his family]," the actor teased.
"The next couple of episodes we'll be seeing more of DeLuca, his sister and their past. Hopefully it will create some more common ground between him and Meredith."
Also coming up this season is an hour centering on Camilla Luddington's Jo. According to the actress, the upcoming hour was the "hardest" episode she ever filmed on the medical series.
While adding: “It’s unbelievable. It’s so powerful.”
The hour, set for season 5's episode 19, is helmed by Luddington's co-star Debbie Allen and will get a spring airdate.
BONUS SPOILER BIT:
- Episode 5.15 is titled "We Didn't Start the Fire". Airdate is on Feb. 28th.
Head over to Grey's Anatomy Spoilers page for the latest news.