When an FBI cadet with amazing profiling skills approaches Doggett, Reyes and Scully with a lead on a suspect in a series of recent murders, he claims the same killer is responsible for the death of Doggett's son. The agents find themselves wondering if his knowledge of the deaths is because of his obsession with the cases he has studied at Quantico or if he is in some way involved in the murders. **# This episode marks the final appearance of Cary Elwes as A.D. Brad Follmer. Presumably, after he killed Regali at the climax, the video tape depicting his accepting a bribe landed at the Washington Post, resulting in Follmer's dismissal from the FBI, and possibly even being sent to prison on charges of taking bribes and murder. Still, it showed that Follmer wasn't a complete creep, as previous episodes led several viewers to think. # The actor who portrays Cadet Hayes was actually a writing intern on the show. # The woman playing Agent Doggett's wife in this episode is Robert Patrick's real wife, Barbara Patrick.