I just watched 9-1-1: Lone Star 4×06 "This is Not A Drill" https://trakt.tv/shows/9-1-1-lone-star/seasons/4/episodes/6 #trakt
Capt. Strand reveals to the 126 he has been working with the FBI to help bring down a domestic terrorist group with his Austin motorcycle club/gang The Honor Dogs, then race Owen to respond to a bomb threat at the State Capitol and put a stop to the terrorist deadly plans.