9-1-1: Lone Star

The 126 race into action when an armored truck is hi-jacked; Owen grapples with his brother's death; a familiar face joins the call center.

The 126 race into action when a major train derailment causes multiple injuries; Meanwhile Tommy makes a bold move in her relationship with Trevor; Wyatt asks Owen to give Judd his job back as Marjan and Paul continue to compete for the open position.

The 126 race to contain a toxic chlorine cloud of death unleashed by the train derailment. Owen names the station’s new lieutenant as Judd finds a path forward.

The 126 are called on the scene to a hoarder’s rat-infested house, then are trapped in an elevator as a woman goes into labor; Tommy and Trevor host his ex-wife Cassandra for dinner which goes awry.

The 126 race into action when a horse barrels into a brewery and a bus full of tourists all experience seizures.

The 126 race to save a man crushed under a vending machine; Owen finally faces his brother's death as Nancy faces a health scare.

TK gets a huge surprise on his 30th birthday; Tommy is determined to push through her latest crisis; Wyatt attempts to talk down a suicidal caller.

A gang killing leads Carlos to new information on his father’s murder. TK contemplates a major life decision as Owen is determined to get Austin’s first responders’ health care coverages increased.

Carlos is determined to solve his father’s murder. Owen is offered a life-changing opportunity. Judd gives into his demons as Tommy begins her treatment.

Owen questions Judd's sobriety when he literally walks into the line of fire; Marjan introduces her boyfriend to her parents.

Owen makes a decision about his future; Tommy receives devastating news; T.K. and Carlos worry about adopting Jonah; Mateo gets his immigration status threatened after an altercation; a doomsday prepper gets trapped in a bomb shelter and The 126 and all of Austin brace for an asteroid crash.

Owen and the 126 deal with the aftermath of the asteroid crash in Austin while an even greater threat looms.