The 126 are called to a county fair when a series of severe thunderstorms hit Austin. Owen's newfound motorcycling passion puts him on a potentially dangerous path.

The 126 race to rescue a woman trapped in her mobile home that is hijacked by her ex. Owen encounters his former nemesis, Sgt. O'Brien, and is then questioned by the FBI. T.K. and Carlos meet with Iris Blake.

Owen gets pulled deeper into the FBI's investigation of the motorcycle gang. The 126 respond to a call from a man who claims his girlfriend slipped over a cliff side. Carlos searches for a missing friend.

As Owen wears an FBI wire for his meeting with O'Brien, The Honor Dogs crash the meet-up and let them know there's an infiltrator in their midst. A frantic TK desperately searches for a held captive Carlos.

Owen helps defend Marjan when a rescue complaint forces her to make a challenging ethical decision; Grace befriends a young boy who becomes a frequent 9-1-1 caller, but when she discovers he may be in some real danger she must step in.

Owen reveals to the 126 he has been working with the FBI to help bring down a domestic terrorist group with his motorcycle gang. Then the 126 respond to a bomb threat at the State Capitol and put a stop to the terrorist deadly plans.

The 126 help a husband whose wife "dies" when she is not upside down. A pizza delivery driver gets the shock of his life. Tommy meets her match when Trevor's daughter becomes her rival.

The 126 must rescue a father/son involved in a driver's ed lesson gone haywire. Owen turns into a "Dadzilla" in helping plan T.K. and Carlos' wedding. Marjan is suspicious when she meets a couple on her road trip.

On her way back to Austin, Marjan is in for the fight of her life when she is targeted by a killer.

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