Meghan Maureen McDonough

The parents of a missing college student seek help; David gets help on the Cytron case from an unexpected source; Mellie proves her political prowess.

Ted, Marshall and Barney embark on another "trilogy time," where they get together every three years to watch the "Star Wars" trilogy and envision what their lives will be like in another three years. Meanwhile Barney and Quinn move in together.

When the bodies of two seemingly unrelated victims are found just hours apart in San Diego and Los Angeles respectively, the BAU suspects that not one, but two killers are working together to commit these murders.

The doctors are faced with the consequences of the events at April's wedding; Alex reacts to the news about his father; Callie and Arizona make a decision about their relationship.

When Goodwin (S. Epatha Merkerson) receives financial complaints from the hospital board, she is forced to implement new guidelines that cause headaches for the doctors. Dr. Rhodes (Colin Donnell) and Ava (Norma Kuhling) continue to compete in the operating room, while Dr. Charles (Oliver Platt) and Dr. Reese (Rachel DiPillo) are surprised when they treat a man who has a peculiar theory about his sickness. Dr. Manning (Torrey DeVitto) and Dr. Choi (Brain Tee) can't figure out what is wrong with a young girl, leading them to look to a questionable source for answers.