Episode 48 of "Numb3rs"
s03e11 Killer Chat
Title: Killer Chat
Original Air Date: 12/15/2006 on CBS
Plot Outline:
Don and Charlie try to catch a serial killer who is seeking revenge against Internet sexual predators who prey on young girls they meet in chat rooms. Internet sexual predators become the victims when a serial killer decides to get revenge by murdering them in order to permanently stop their behavior. Meanwhile, Charlie faces one of his more complicated problems: saying goodbye to Larry who is leaving for a six month NASA space shuttle mission.
