HOLD. YOUR. BREATH!

Austin's126 is First on the Scene When a Catastrophic Train Derailment Unleashes a "Poison Cloud of Death" in the Season 5 Premiere of 9-1-1: LONE STAR

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9-1-1: LONE STAR RETURNS MONDAY, SEPT. 23 (8:00 PM ET/PT) on FOX and Next Day on HULU

Firefighter drama 9-1-1: Lone Star begins its fifth season on Monday, Sept. 23 (8:00-9:00 PM ET/PT), followed by the time-period premiere of Rescue: HI-Surf (9:00-10:00 PM ET/PT) on FOX. Starring Emmy Award nominee Rob Lowe, 9-1-1: Lone Star follows members of Austin's 126 Fire Department led by Captain Owen Strand (Lowe) who, along with his adult son, T.K. (Ronen Rubinstein), moved to Texas to help rebuild the firehouse which had experienced a tragedy of its own. His team of diverse and qualified first responders include widowed Paramedic Captain Tommy Vega (Gina Torres), Judd Ryder (Jim Parrack), who was the sole survivor of Austin's original 126 house after a rescue call ended in tragedy; Marjan Marwani (Natacha Karam), an adrenaline junkie and badass firefighter who also is a devout Muslim; Paul Strickland (Brian Michael Smith), a transgender male firefighter, who bravely decided to transition on the job in Chicago and has a gift for observation worthy of Sherlock Holmes; and rookie firefighter Mateo Chavez (Julian Works). Settling into his new home, T.K. caught the eye of police officer Carlos Reyes (Rafael Silva) and the two began a romantic relationship, eventually marrying in the Season Four finale. T.K hung up his firefighter helmet to become a full-time paramedic under Tommy's guidance and works closely with fellow paramedic Nancy Gillian (Brianna Baker).

In the upcoming fifth season, Captains Strand and Vega, along with the 126 team, race into action when in a multi-episodic opening storyline, a catastrophic train derailment endangers several lives, including some of their own. With Judd resigning from the 126 to take care of his recently handicapped son Wyatt (Jackson Pace), Owen must find a new lieutenant to replace Judd and has a difficult decision ahead of him when both Marjan and Paul apply for the promotion. Tommy is ready to take the next step in her relationship, but she finds the road to happiness is filled with obstacles. On his 30th birthday, T.K. gets a surprise visit from someone from his past that could change his and Carlos' lives forever. Now officially husband and husband, T.K. and Carlos' marriage is put to the test when Carlos becomes obsessed with solving his father's murder. 9-1-1: Lone Star is produced by 20th Television in association with Ryan Murphy Television and Brad Falchuk Teley-Vision. Ryan Murphy, Brad Falchuk and Tim Minear are creators, executive producers and writers on the series. Bradley Buecker is an executive producer and directed the series premiere. Alexis Martin Woodall, Rashad Raisani, John J. Gray, Angela Bassett, Rob Lowe, Carly Soteras and Wolfe Coleman are executive producers.