What is Diane, a genetics research assistant up to with her boyfriend on Criminal Minds. Michelle Trachtenberg guest stars in "Zugzwang" the 12th episode of the show's ninth season.
The team heads off to investigate the death of people posting personal information on blogs on Criminal Minds. "The Gathering" is the 17th episode of the show's ninth season.
The team is headed to San Francisco to investigate a string of murders on Criminal Minds. "Magnum Opus" is the 13th episode of the show's ninth season.