Jason Pendergraft

In this mid-season finale, Peter and Neal attend an FBI conference where someone is trying to steal high valued defense technology. They soon discover the thief's brazen plan to take something much more valuable from the FBI.

A killer leaves an envelope of cash on his victims; Holmes makes a gesture toward Watson as she deals with a personal crisis.

Mac investigates the murder of a bridegroom, whose body was wrapped like a wedding present; Stella finds a box of bloodstained puzzle pieces on her car; Mac goes home to Chicago to solve the biggest mystery of his life.