9-1-1: Lone Star 4x18 "Two Weddings And A Train Wreck" - Owen is conflicted when his brother Robert (guest star Chad Lowe) asks him for help; Judd and Grace face a family crisis; As T.K. and Carlos prepare for their wedding day tragedy strikes in the all-new 'Best of Men' / 'In Sickness and In Health' 4th season finale episodes of 9-1-1: Lone Star airing Tuesday, May 16th on FOX.