6.4 0Add to favorites 0Add to Watchlist 0Add as SeenOnce Upon a Time in Mexico(Sep. 11, 2003) Sep. 11, 2003 6.4 Once Upon a Time in Mexico IMDb: 6.4 2003 102 min 436 views Hitman “El Mariachi” becomes involved in international espionage involving a psychotic CIA agent and a corrupt Mexican general. ActionDramaMystery