Bruce Katzman

The nurses' complaints about Mark Sloan's trysts result in a date-and-tell policy; Cristina is forced to face her feelings for Burke; Meredith and Derek admit a veteran into their clinical trial.

As Carlos continues serving his jail sentence, Gabrielle valiantly tries to free him. Meanwhile Mike and Susan face a crisis in their relationship, and Paul Young returns.

As Hotch fights for his life after being stabbed, he has visions of his late wife and his nemesis; when a teen goes missing, suspicions arise about her estranged father.

An explosion at Dell's house sends Heather and Betsey to the hospital; a shocking family secret is revealed when Addison's mother visits.

When Peggy moves to Los Angeles to assist with an unusual homicide, she is reunited with familiar faces.

The team works to determine whether a serial killer is threatening Garcia's life.