During the last episode of the crossover between Grey's Anatomy and Private Practice, Mark told Derek about his new love, but the latter didn't quite appreciate it, especially after the rough day he had had and they had a physical fight because of it. Mark and Lexie kept their relationship secret for a moment, Lexie being even covered by Sadie after Mark's "injury", but Lexie asked him to go public with her.The romances between Mark Sloan and Lexie Grey and between Callie Torres and new pediatric surgeon Arizona Robbins were newly-founded.However, he showed her he would stick with her after a case they shared with an older surgeon who was asked to retire, saying he hoped to still be there for Cristina during the years to come. Hunt's old fiancée, with whom he had briefly broke up without telling her he was coming back from war. Cristina had to deal with the reappearance of Dr.Robbins, she made an application for a Pediatric Surgery fellowship, which leaves the Chief displeased. Dixon's comments about the way she cared about kids made her change her mind, choosing Pediatric Surgery as a specialty instead. Bailey he had made the request to promote her as an attending in General Surgery, one of Dr. There is intensity rising between the residents as an opportunity for a solo surgery comes into play.Sadie, Meredith's old friend, is back into Meredith's life and Cristina reacts to this.Lexie and her fellow interns perform procedures on each other (from injections to surgeries) in an attempt to learn things they believe they are not learning from their residents.Derek's discovery of Meredith's mother's journals from when she was a resident and Meredith's reaction to the journals.Richard deals with the hospital only being 12th best.Izzie gets worried when Denny starts appearing to her.Callie starts to explore her sexuality.The residents receive their first solo surgeries.Meredith and Derek move forward in their relationship.Owen Hunt with whom she has a hot and cold relationship. Cristina deals with the new trauma surgeon, Dr.Discover what happens in the on-again, off-again world of Derek and Meredith, and witness the budding relationship between Cristina and Owen, Seattle Grace's newest doctor. Dive deeper into the lives and loves of "Grey's Anatomy"! The doctors struggle and thrive as they enter uncharted territories of life. My official resignation." He continues reflecting on his many memories at the hospital, leaning over the surgery observation deck as the preview briefly cuts back to a clip of him standing in the exact same spot as a resident.Live for the moment. "You're going to Boston?" Miranda Bailey asks incredulously, to which Jackson replies, "I am. It begins with Jackson arriving at Grey Sloan Memorial and turning to look at the hospital's iconic logo, clearly hit with the weight of all the goodbyes he'll have to say. Now that he's decided to leave, it's time for Jackson to break the news to his fellow doctors, which is what the promo for Season 17, Episode 15 (titled "Traditions) is all about. But for the other characters (and the fans), Jackson's exit is still heartbreaking. Jackson convinced his newly single ex-wife April Kepner to move there with him so they could co-parent their daughter Harriet, hinting at a long-awaited happy ending for Japril. To do that, though, he needed to move to Boston. During Grey's Anatomy Season 17, Episode 14 (titled "Look Up Child"), Jackson realized he wanted to take over his family's foundation and fight for racial equality in medicine. Warning: Spoilers for Grey's Anatomy Season 17, Episode 14 follow. Given how important he's been to the show, it's only right that the Grey's Anatomy Season 17, Episode 15 promo is all about saying goodbye to Jackson. After starring as Jackson Avery since Season 6, actor Jesse Williams will play the character one last time in the upcoming May 20 episode. Another beloved Grey's Anatomy doctor is leaving Grey Sloan Memorial forever.