"And Then There Was One" is the nineteenth episode of the fifth season of Private Practice and the 95th produced episode of the series. It is also the 263rd produced episode of the Grey's Anatomy franchise. It was broadcast on April 24, 2012.
Amelia shuts off from her peers when she recieves devestating news from her pregnancy and, as Addison tries to adjust to the new man in her life, her sucsessful motherhood brings her and Amelia's friendship to a standstill. Cooper and Charlotte struggle to deal with Mason's way of coping with his mother's death while Violet and Pete try marriage councelling, but Violet's suspicions of a patients sister causes conflict between the two. Meanwhile, Sam and Jake come to blows over Addison.
- "Someone You Need" - Rufus Wainwright
- "When I Grow Up" - First Aid Kit