Watch the official “When You Gotta Go” clip from the FOX drama series 9-1-1: Lone Star Season 4 Episode 1, created by Ryan Murphy, Brad Falchuk and Tim Minear.br br 9-1-1: Lone Star Cast:br br Rob Lowe, Liv Tyler, Ronen Rubinstein, Sierra McClain, Jim Parrack, Natacha Karam, Brian Michael Smith, Rafael L.