Charles goes undercover among gang members from his old neighborhood when it's discovered that they've been stealing explosives and weapons. Meanwhile, Tiffy gets hurt at work and Mack goes after her attackers.
Quest roles:
Jorge-Luis Pallo, Larry Bates, Nick Toren, Roberto Montesinos, Stana Katic, Jose Pablo Cantillo, Christina Gianaris, Yara Martinez, Frankie Rodriguez, Jarrod Bunch, Enver Gjokaj, J.J. Dashnaw(-1), Brian Majestic(-1)