The 3 season of El Marginal was broadcast on Netflix from mardi 9 juillet 2019 to mardi 27 août 2019. It consists of 8 episodes, the first one is called "Capítulo 1" and the last one "Capítulo 8".
Miguel, a former Argentinian cop, is sent by a judge to get into a prison in order to find the kidnapper of his daughter as a result of a favor. Once in there, he changes his name to Pastor Peña, and tries to survive by gaining the confidence of the recluses. Meanwhile, the Superintendent of the Prison, a social psychologist and one of the most important recluses, who controls the prison from inside are part of this big mafia structure.