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.

Criminal Minds Season 8 Episode 12 Quotes

Hotch: And what did he say to you?
Reid: Zugzwang. It's a chess term. Describes a point in the chess game when a player realizes he'll inevitably be checkmated. He has to decide whether to resign, or to play through to the bitter end.

You see, when men cheat it's below the belt. But when women cheat, it's above the neck.