'9-1-1: Lone Star' Boss Breaks Down Finale and Teases Season 4 Wedding (Exclusive)

'9-1-1: Lone Star' Finale Sneak Peek: Judd Is in Danger During a Building Collapse (Exclusive)

Rob Lowe's brother Chad has been cast as his sibling on 9-1-1: Lone Star

'9-1-1: Lone Star' Casts Rob Lowe's Real Brother Chad to Play His Sibling on the Show