Teddy confronts Meredith about operating on Nathan's fiancee, Megan, when Megan doesn't know about Meredith's history with Nathan. Before Meredith can respond, Amelia jumps to her defense. Teddy then confronts Amelia about her broken relationship with Owen, and is taken aback when Amelia lashes out at her. Watch this scene from the Season 14 Premiere, 'Break Down the House,' and don't miss Grey's Anatomy THURSDAYS 8|7c on ABC.