Joseph Fuhr

A series of murders in San Francisco bearing the tell-tale signs of the infamous Zodiac Killer have the BAU wondering if the notorious serial killer has returned. Meanwhile, Reid ponders if he should be doing more with his genius abilities.

On leave from NCIS while still grieving the loss of his wife and the mother of his children, Director Vance discovers unexpected personal information, causing him to question everything.

Sweets gives professional chess players a run for their money when he goes undercover to find clues related to a grandmaster's murder.

Mary returns from maternity leave to find new office dynamics; a witness has the ability to take down a secret society.