Bailey arranges a domino kidney surgery involving all the residents and interns; Meredith is upset Derek didn't include her in the article on their clinical trial.
The BAU investigates when several young men and women are victims of disfiguring acid attacks. Also, Dr. Reid begins to settle into his new surroundings.
Cooper, Sam, Amelia and Charlotte try to save Pete's life after his heart attack; Addison's desire to have a child leads to a surprising encounter; Sheldon hopes to help Amelia with her alcohol addiction.
Adam is determined to figure out what Andi's hiding when he discovers she's been keeping secrets from him for his own good.
Beth navigates qualms with her mother; Kevin and Kate bring their families together for dinner.
