The procedural has been on since 2005, so it comes as no surprise that many characters have come and gone through the doors of Grey Sloan Memorial Hospital over the years. Mason joined Grey's Anatomy in season 14 as new intern Sam Bello who has a back and forth relationship with her ex Andrew DeLuca (Giacomo Gianniotti) who also happens to be a new intern at the hospital. She has only been on the show this season, so we were only just starting to get to know her and her character's backstory . We did get to see a bit more of her in the spin-off series Grey's Anatomy: B-Team