Season four begins with the introduction of a new character: Javier, or Javi, Omar Navarro's nephew. Navarro explains to Marty and Wendy that Javi wants the top spot in the cartel and is willing to kill Navarro and his family to get it. As a result, Navarro wants out. To achieve that, Navarro wants the Byrdes to use their contact in the FBI, Maya Miller, to broker a deal that will see him come to the U.S. as a free citizen.