The Unit Episode 4.04 The Conduit

In the hunt to kill a drug lord, Bob, Jonas and Grey pose as chemists with a formula for turning cocaine into paint for smuggling. Meanwhile, Mack penetrates the cartel as a human cockfighter, and is forced into a death match. Bridget runs the TOC while Tom Ryan heads to D.C., where he must obtain a signature to authorize Mack's extraction by submarine. Back at home: Lissy's school principal grows suspicious about her identity, forcing Tiffy into action. Kim tries to cover, but fails. That forces Molly to intervene.