Tru Love (S06E02)

Keith Cooper (guest star Anton Yelchin) is no stranger to his dad's womanizing ways, but when Dr. Grant Cooper winds up dead after his motorcycle is found sabotaged, Detectives Logan (Chris Noth) and Wheeler (Julianne Nicholson) find a private collection of the Doctor's personal conquests.  When Keith's high-school teacher, Danielle (guest star Anne Dudek) shows up on one of tapes, the Detectives assume her jealous husband is to blame.  But the case takes a major turn when the Detectives find Danielle in the arms of her under-aged student. (iTunes)