David Proffitt

When Gemma hires Alexis (guest star Nicole Sullivan) to teach at her school, Tina suspects the new teacher may not be quite who she claims to be. Also, Calvin tries to save the community baseball field where he first taught Malcolm how to play.

In order to get intel on a matter of national security, Kensi must come face-to-face with a sociopath who has been obsessed with her since she put him in jail years ago.