Cynthia Rose Hall

On Halloween, the squad members compete to win the title of "Ultimate Detective Slash Genius."

Morgan brings the BAU new information in the case against Mr. Scratch, a serial killer and escaped convict who has been wreaking havoc on the team.

When Reid fears his mother has been abducted, he asks the BAU to investigate while he's stuck in prison.

SAMCRO tries to deal with the fallout from a threat on Tara's life.

Another couple upstages Greg and Jen's parental skills when they take Lark on her first airplane trip; Joan and John try to smuggle their dog onto the plane; Matt and Colleen miss their flights.

In the season finale, dark secrets are revealed as Coulson and his team put everything on the line to stop Garrett and the forces of HYDRA.