9-1-1: Lone Star 4×15 Promo “Donors”

9-1-1: Lone Star 4×15 “Donors” Season 4 Episode 15 Promo – Grace and Carlos work together when they suspect a young woman was a victim of a black market organ trafficking ring; Owen’s brother Robert comes to visit and meet T.K., but surprises Owen with news that can affect the Strand family in the all-new “Donors” episode of 9-1-1: Lone Star airing Tuesday, May 2nd on FOX.