Matthew J. Cates

Charlie finds that one of his former girlfriends has a son who looks a lot like him.

The CBI pursues two lines of investigation when a Santa is murdered: Patrick Jane goes undercover in an AA group; and Rigsby and Van Pelt question members of the National Society of Authentic Santas. Meanwhile, following the demise of a person in custody at the CBI, J.J. LaRoche (guest star Pruitt Taylor Vince) is brought in to question the team when it appears to be an inside job. Guest star Gregory Itzen returns as retired former CBI director Vincent Minelli.

The team steps in when Rossi decides to revisit the unsolved murder of two young parents.

Jess catches the eye of a professional football player (guest star Steve Howey, “Shameless”), with whom Winston landed an exclusive interview for his radio station. Meanwhile, Nick and Schmidt argue over the planning of their “TinFinity” party celebrating their tenth anniversary of living together, and Cece gets a surprise offer.

Christian contemplates his relationship with Kimber; Sean begins to heal emotionally following an encounter with a perfection-seeking patient.