Mycroft comes to New York and asks Sherlock and Watson to assist with a case involving his former fiancé, and Sherlock struggles with understanding Watson and Mycroft's relationship.
The BAU meets in secret to investigate a subject who appears to be kidnapping and photographing young women.
While Penguin and Galavan continue to battle for control of the Gotham underworld, another new villain is the focus of the police.
As Theo Galavan forces the Penguin to work for him, and the old family rivalry between the Waynes and Galavans resurfaces, Jim Gordon struggles to maintain order in the city.
A new captain takes over the GCPD, and seems just as determined to clean up the city as Jim Gordon, but as the new guy begins to ask questions, Gordon begins to worry that his own unsavoury associations might come to light.