The official synopsis for season 4 is as follows:
Narcos: Mexico will explore the origins of the modern drug war by going back to its roots, beginning at a time when the Mexican trafficking world was a loose and disorganized confederation of independent growers and dealers. Witness the rise of the Guadalajara Cartel in the 1980s as Félix Gallardo takes the helm, unifying traffickers in order to build an empire. When DEA agent Kiki Camarena moves his wife and young son from California to Guadalajara to take on a new post, he quickly learns that his assignment will be more challenging than he ever could have imagined. As Kiki garners intelligence on Félix and becomes more entangled in his mission, a tragic chain of events unfold, affecting the drug trade and the war against it for years to come.
The fourth season will star Diego Luna, Michael Pena, Aaron Staton, Alejandro Edda, Alfonso Dosal, Alyssa Diaz, Clark Freeman, Ernesto Alterio, Fermín Martinez, Fernanda Urrejola, Gerardo Taracena, Gorka Lasaosa, Guillermo Villegas, Horacio Garcia Rojas, Jackie Earle Haley, Joaquín Cosío, José María Yazpik, Lenny Jacobson, Manuel Masalva, Matt Letscher, Tenoch Huerta, Teresa Ruiz, Tessa Ia and Yul Vazquez.
Narcos: Mexico will be available on the streaming service from the 16th November 2018.