A toxic chlorine cloud of death that needs to be contained? You know the members of the 126 are going to volunteer to take care of it, and that’s exactly what happens in TV Insider’s exclusive sneak peek of the October 7 episode of 9-1-1: Lone Star. In the conclusion of the three-parter to open the fifth and final season of the Fox drama, the 126 continues to deal with the train derailment emergency and now that aforementioned chlorine gas leak. Paul (Brian Michael Smith) and Marjan (Natacha Karam) have gathered the supplies needed to seal the leak on a train car, and Owen (Rob Lowe) is ready to put himself in the most dangerous position when he’s called to the command tent; the city sent in suits from emergency management who want to talk to him, and they’re not asking. Owen looks for a volunteer, and both Paul and Marjan immediately step up.