As Owen gets pulled deeper into the FBI's investigation of the motorcycle gang, Sgt. O'Brien makes a confession to him. Meanwhile, Grace and the 126 respond to a call from a man who claims his girlfriend slipped over the side of a cliff and Carlos searches for a missing friend, putting his own life in danger.
s04e01 - The New Hotness
s04e02 - The New Hot Mess
s04e03 - Cry Wolf
s04e04 - Abandoned
s04e05 - Human Resources
s04e06 - This Is Not a Drill
s04e07 - Tommy Dearest
s04e08 - Control Freaks
s04e09 - Road Kill
s04e10 - Sellouts
s04e11 - Double Trouble
s04e12 - Swipe Left
s04e13 - Open
s04e14 - Tongues Out
s04e15 - Donors
s04e16 - A House Divided
s04e17 - Best of Men
s04e18 - In Sickness and in Health
Nearly 20 years ago, Owen Strand was the lone survivor of his Manhattan firehouse on 9/11. In the wake of the attack, Owen had the unenviable task of rebuilding his station. After a similar tragedy happens to a firehouse in Austin, Owen, along with his troubled firefighter son, T.K., takes his progressive philosophies of life and firefighting down to Texas, where he helps them start anew. On the surface, Owen is all about big-city style and swagger, but underneath he struggles with a secret he hides from the world - one that could very well end his life.