Jackson visits his father to tell him about Harriet, and to say goodbye before he and April leave Montana. He informs Robert that there probably won't be any more visits, and lets Robert know that he's not a grandfather to Harriet, and not really a father either, and he walks out on the man who so easily walked out on him. Watch this scene from Season 13, Episode 16, 'Who Is He (And What Is He to You)?' and don't miss Grey's Anatomy THURSDAYS 8|7c on ABC.