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The New Hot Mess - Captain Strand and the 126 race to the rescue when a woman is trapped in her mobile house that has been hijacked by her ex; Owen has a run in with former nemesis Sgt. O'Brien and is then questioned by the FBI; Tommy asks Grace dating advice; T.K. and Carlos meet with Iris Blake.

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A Bright and Cloudless Morning - Captain Strand and the 126 come together when one of their own is trapped after a building explosion. Meanwhile, Owen reflects on his 9/11 experience, T.K. and Carlos come to a decision and Tommy and Julius decide on their future.

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Shift-Less - Owen travels to Los Angeles to confront his estranged father and some painful childhood memories. Wyatt acts out and prompting Judd to take him to his family ranch where an emergency brings them closer to together.

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Down to Clown - Facing his anger management issues, Owen has a breakthrough in therapy. Then, after a particularly devastating emergency call, Grace reaches out to a co-worker, but regrets when Judd offers more than she was planning. Also, a clown has an emergency at a young boy's birthday party and Tommy, T.K. and Nancy race to help a survivalist who has a painful encounter with a reptile.

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Riddle of the Sphynx - The members of the 126 race to find, and then save, a mystery victim in a car crash. Meanwhile, Owen faces a crisis in his relationship with Catherine. Tommy goes on a first date and Carlos is surprised when he meets T.K.'s AA sponsor.

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Prince Albert in a Can - Owen and the 126 race to the rescue when Catherine receives a package at the governor's office that may contain a bio-hazard. Meanwhile, Grace and Carlos team up to investigate a prank 9-1-1 call that turns deadly.

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Parental Guidance - Owen, Tommy & the 126 race to the rescue when a medieval-themed restaurant suffers a case of carbon monoxide poisoning. Meanwhile, the crew is worried that Paul still has not mentally recovered from his surgery and his friendship with Marjan is over. Mateo is offered a promotion by his old fire captain, but quickly realizes he is not the man he once knew.

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The Bird - The members of the 126 spring into action when a surprise military homecoming erupts into chaos. Meanwhile, Owen is left responsible for taking care of a talkative pet, Paul faces a medical emergency and Tommy goes on her first date since Charles' passing.