Season Four (Lone Star)

Season Four
Seasonal Information
Season	4
Episodes	18
Airdate	January 24, 2023 - May 16, 2023
Premiere	"The New Hotness"
Finale	"In Sickness and In Health"
Starring	Rob Lowe Gina Torres Ronen Rubinstein Sierra McClain Jim Parrack Natacha Karam Brian Michael Smith Rafael Silva Julian Works Brianna Baker Kelsey Yates Skyler Yates
Seasonal Chronology
Preceded by	Season Three
Followed by	Season Five

Season Four of 9-1-1: Lone Star was first announced on May 16, 2022. Filming started on August 29, 2022, and ended on April 20th, 2023. It premiered on January 24th, 2023 and ended on May 16th, 2023 with a two-hour finale.

Synopsis

Owen, Tommy and the rest of the 126 are being called into action to a county fair when a ‘derecho,’ a series of fast-moving group of severe thunderstorms, hit Austin, causing hurricane and tornado-force winds, heavy rains, flash floods and a wide path of destruction. And just when they think it couldn’t get worse, an even more rare weather phenomenon, a ‘heat burst,’ causing temperatures to go up to 122 degrees Fahrenheit, hits the city.

Confirmed Storylines

• TK and Carlos' wedding will be shown and we will see them plan their wedding.
• There will be a storyline for Carlos in the premiere where he "trips pretty hard" and that it might "piss off some people, it might not".
• Lyndsy Fonseca will reprise her role as Iris Blake.
• A storyline involving an extremist group planning an attack who's being investigated by a new character, Special Agent Rose Casey and Owen.
• Carlos and Sergeant O'Brien will be working a case together.
• Carlos is hiding a secret from TK and will reveal what it is to him in the first episode.
• A storyline where Carlos' life is put in jeopardy after he investigates the disappearance of someone close to him.

Cast

Starring

• Rob Lowe as Owen Strand (18/18) / Uncle O (1/18)
• Gina Torres as Tommy Vega (17/18) / Marisol Chavez (1/18)
• Ronen Rubinstein as TK Strand (18/18) / Officer Strand (1/18)
• Sierra McClain as Grace Ryder (16/18)
• Jim Parrack as Judd Ryder (17/18) / Milkman Judd (1/18)
• Natacha Karam as Marjan Marwani (16/18) / Daniela Chavez (1/18)
• Brian Michael Smith as Paul Strickland (18/18)
• Rafael Silva as Carlos Reyes (15/18) / Officer Reyes (1/18)
• Julian Works as Mateo Chavez (18/18) / Marvin Chavez (1/18)
• Brianna Baker as Nancy Gillian (18/18)
• Kelsey Yates as Isabella Vega (6/18)
• Skyler Yates as Evie Vega (6/18)

Guest Starring

• Neal McDonough as Sgt. Ty O'Brien (6/18)
• D.B. Woodside as Trevor Parks (6/18)
• Amanda Schull as Special Agent Rose Kasey (5/18)
• Lyndsy Fonseca as Iris Blake (4/18)
• Amanda Payton as Asha Fulton (5/18)
• Bella Blanding as Melody Parks (3/18)
• Michaela McManus as Kendra Harrington (4/18)
• Jackson Pace as Wyatt Harris (4/18)
• China Anne McClain as Lisa Williams (1/18)
• Lauryn McClain as Ashley Williams (1/18)
• Chad Lowe as Robert Strand (4/18)

Episodes

No.	Title	Directed by	Written by	Airdate	Viewers (million)
1	"The New Hotness"	Bradley Buecker	Molly Green & James Leffler	January 24, 2023	3.92
		Captains Strand and Vega along with the members of the 126 are called into action to a county fair when a "Derecho", a series of fast-moving group of severe thunderstorms hit Austin, causing hurricanic and tornadic-force winds, heavy rains, flash floods and a wide path of destruction. Owen's new found passion for motorcycling puts him on a potentially dangerous path. Tommy has the potential for a romance when she meets an attractive single father. And as TK and Carlos prepare for their wedding, a secret from Carlos' past may stand in their way to happiness.
2	"The New Hot Mess"	Chad Lowe	Bob Goodman	January 31, 2023	4.05
		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.
3	"Cry Wolf"	David Katzenberg	Carly Soteras & Wolfe Coleman	February 7, 2023	3.80
		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.
4	"Abandoned"	Christine Khalafian	Jalysa Conway & Jamie Kessler	February 14, 2023	3.65
		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 missing and held captive Carlos.
5	"Human Resources"	Felix Enriquez Alcala	Molly Green & James Leffler	February 21, 2023	3.54
		Owen defends Marjan when a rescue complaint forces her to make a challenging ethical decisions. Meanwhile, 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.
6	"This Is Not A Drill"	Michael Medico	Kelly Souders & Brian Peterson	February 28, 2023	3.39
		Capt. Strand reveals to the 126 he has been working with the FBI to help bring down a domestic terrorist group with his Austin motorcycle club/gang The Honor Dogs, then race Owen to respond to a bomb threat at the State Capitol and put a stop to the terrorist deadly plans.
7	"Tommy Dearest"	Scott White	Bob Goodman & Jamie Kessler	March 7, 2023	4.08
		Capt. Strand and the 126 help a husband whose wife "dies" when she is not upside down. Grace takes a call from a pizza delivery driver who is in for the shock of his life. Tommy is worried Trevor's young daughter is a bad seed as she attempts to break them up. Paul is hesitant to go on a date with Asha, who knows him prior to his transition.
8	"Control Freaks"	Tori Garrett	Jalysa Conway	March 14, 2023	3.71
		The 126 must rescue a father/son involved in drivers ed lesson gone haywire, then encounter a self-help guru who has lost self-control. Meanwhile, Owen turns into a "Dadzilla" in helping plan TK and Carlos' wedding, and Marjan is suspicious when she meets a couple on her road trip.
9	"Road Kill"	Brenna Malloy	Carly Soteras & Wolfe Coleman	March 21, 2023	3.59
		On her way back to Austin, Marjan is in for the fight of her life when she is targeted by a killer.
10	"Sellouts"	Tessa Blake	Molly Green & James Leffler	March 28, 2023	3.89
		Tommy goes paramedic crew-to-crew against her former employer, private contractors Paragons Medics as they deal with emergencies involving a dialysis patient and at a perfume factory. Meanwhile, Owen hits it off with a beautiful woman he meets at a fundraiser.
11	"Double Trouble"	Bradley Buecker	Jamie Kessler	April 4, 2023	3.37
		The 126 race to rescue a woman with an arrow shot into her head. Judd is doubly surprised by news Wyatt shares, Mateo helps a family member in need and comes to regret it.
12	"Swipe Left"	Steve Danton	Carly Soteras	April 11, 2023	3.47
		When she discovers her former fiancé is having a baby with his new wife, the 126 help Marjan enter the dating world through a series of chaperoned dates. Owen and the team are called to the rescue when a pregnant woman takes matters (and her anger) out at a motel where she suspects her husband is cheating on her.
13	"Open"	John J. Gray	Wolfe Coleman	April 18, 2023	3.35
		Owen is shocked by a secret Kendra has been keeping from him; Grace confronts her father about his past infidelity.
14	"Tongues Out"	Keith Tripler	Bob Goodman	April 25, 2023	3.34
		Owen enlists Paul's help in proving Kendra's innocence; Tommy deals with church gossips over her relationship with Pastor Trevor.
15	"Donors"	Brenna Malloy	Kelly Souders & Brian Peterson	May 2, 2023	3.54
		Grace and Carlos work together when they suspect a young woman was a victim of a black market organ trafficking ring; Owen's brother Robert comes to visit and meet TK, but surprises Owen with news that can affect the Strand family.
16	"A House Divided"	Tessa Blake	Matt Solik	May 9, 2023	3.37
		When Tommy and Judd disagree on protocol during a rescue at paper mill, a full-on feud develops between the 126 EMS and Fire. Owen awaits news that could change his and TK's life forever.
17	"Best Of Men"	Chad Lowe	Tim Minear & Rashad Raisani	May 16, 2023	3.24
		Owen is conflicted when his brother Robert asks him for help; Judd and Grace face a family crisis.
18	"In Sickness and In Health"	Bradley Buecker	Tim Minear & Rashad Raisani	May 16, 2023	3.30
		As TK and Carlos prepare for their wedding day tragedy strikes.

Multimedia

Promotional Images

Behind the Scenes

Trivia

• The season was originally supposed to premiere on January 17, 2023, but was delayed.
• On September 28, 2022, it was announced that Neal McDonough, D.B. Woodside, and Amanda Schull had been cast in recurring roles for the fourth season.
• Lyndsy Fonseca, who portrays Michelle Blake's sister, Iris, returns this season.
• The entire main cast, with the exception of Kelsey & Skyler Yates, took new promotional photos for the season.
• This is Sierra McClain's last season as a series regular.