Matthew J. Cates

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

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.

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

Linette has a car accident; Evan takes on a dangerous job to provide financial help to Riley; Riley and Evan are burdened by Kyle's mistakes; Riley hires a male masseur; a veteran client needs more than Riley can handle.

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