Grey's Anatomy Season 15 Episode 17, titled "And Dream of Sheep," will show the return of Carina DeLuca (Stefania Spampinato). The new episode will be tackling some of the DeLucas' family history that may have a connection to what Andrew (Giacomo Gianniotti) told Meredith (Ellen Pompeo) earlier this season.

"Ties are strained as Andrew and Carina confront an unforgiving family history," Grey's Anatomy Season 15 Episode 17's official synopsis read. "Teddy (Kim Raver) and Owen (Kevin McKidd) work together on a married couple who is expecting; Amelia (Caterina Scorsone) attends a conference for alternative pain relief."

According to CarterMatt, Grey's Anatomy Season 15 Episode 17 will be addressing some of Andrew's family history. It will also see the return of his sister, Carina. It has been a while since fans last saw the other DeLuca doctor.

Carina's storyline has been tied in Arizona, but she will be an integral part of Grey's Anatomy Season 15 Episode 17, given that it will tackle the DeLucas. It may be important to have Andrew surrounded by his family, who was also there and knew what it felt like to be in that environment, to know his feelings.

In Grey's Anatomy Season 15 Episode 17 events, Teddy and Owen will be working together to assist a married couple who are expecting to have their baby. This new assignment may make these two closer together.

However, it looks the series has worked to avoid adding some "superficial angles" to Teddy and Owen's stories this season. They have ended their love triangle with Amelia, while Teddy formed a new love interest with Koracick (Greg Germann). Their relationship is now developing to be both "lovely and odd" in all the right ways, and fans are hoping to see it continue as long as possible.

Talking about Amelia, it is a big question of what is she doing at the conference in Grey's Anatomy Season 15 Episode 17. As a doctor, she needs to join medical conferences, but in this show, every single story has been there for a reason. So, this is something fans need to find out in the next episode.

Meanwhile, E! News reported Grey's Anatomy Season 15 would be longer as ABC ordered for another three additional episodes. In total, the show now has 25 episodes to offer, making this season the "longest-running primetime medical drama ever." It also becomes the network's No. 1 television series for the 2018-2019 season with an average of 3.1 rating in the 18-49 demographic.

Grey's Anatomy Season 15 Episode 17, titled "And Dream of Sheep," will air on Thursday, March 14, on ABC. Fans who want to know more about the DeLuca family will surely need to see this episode.