Two films featuring Hernández premiered in 2015, including "Hilda" and "Mexican Gangster: La Leyenda del Charro Misterioso", and the actor was nominated for a Diosa de Plata for Best Supporting Actor for the latter film. The same year, Hernández joined filmmaker Gabriel Ripstein on his directorial debut with "600 Millas", produced by Ripstein and Mexican director Michel Franco. The screenplay, by Ripstein and Issa López, was inspired by the ATF gunwalking scandal. In the film, weapons smuggler Arnulfo Rubio (Kristyan Ferrer) works for a Mexican cartel led by his uncle Martín (Hernández). ATF agent Hank Harris (Tim Roth), who tries to arrest him, is kidnapped by Rubio to bring to his bosses; during the drive, they became friends. "600 Millas" premiered in the Panorama Section of the 65th Berlin International Film Festival, opened in 150 screens in Mexico on December 4, 2015, and was selected to represent the country at the 88th Academy Awards in the Best Foreign Language Film category. Coincidentally, "La Tirisia", Hernández's previous film, was selected to represent the country for the Goya Award for Best Spanish Language Foreign Film in Spain. In 2016, "600 Miles" received 13 nominations for the 58th Ariel Awards, and Hernández won his second consecutive award for Best Supporting Actor.