Relationships are challenged at Station 19 following Sullivan’s actions at Maya and Carina’s wedding, putting his marriage with Andy to the test. Dean comes to terms with his feelings for Vic, while Travis rekindles an old flame. The annual Phoenix Festival brings out some reckless behavior in some of Seattle’s citizens, challenging the teams at Station 19 and Grey Sloan Memorial.

The crossover continues on Grey's Anatomy S18E01 Here Comes the Sun (II).

Andy and Sullivan’s relationship continues to be tested. Meanwhile, Emmett joins Dean and Vic on a mental health call, and Maya does some soul searching.

When a heat wave hits Seattle, Station 19 becomes a cooling center and chaos ensues with locals who aren’t used to the extreme temperatures. Andy deals with regret and finds a friend in Theo. Joey comes face-to-face with his past during a ride-along with Ben and Jack

Diane returns to help with Crisis One intervention training for Station 19 and Station 23 firefighters. Meanwhile, Andy and Sullivan continue to be at odds, and Jack helps a young autistic man on a city bus.

When Theo and Vic hit a relationship milestone, Vic is forced to reckon with her feelings about commitment. Andy takes refuge at Dean’s home and helps care for Pruitt, while Dean considers a new potential career opportunity. Meanwhile, an explosion rips apart a neighborhood and changes the lives of our firefighters forever. The crossover continues on Grey's Anatomy S18E05: Bottle Up and Explode! (II)

Station 19 and Station 23 each attempt to celebrate Thanksgiving following the fallout from the neighborhood explosion. The firefighters come together to cook, toast to loved ones they have lost, and celebrate the families they have become.

Vic and Jack lean on one another as they process the loss of Dean while Ben and Bailey try to convince Dean’s parents to allow them to raise Pru. Meanwhile at Station 23, Andy’s role temporarily expands and Sullivan subs in. Carina and Maya explore growing their family.

It’s the most wonderful time of the year and the firefighters have their hands full responding to a number of crises throughout Seattle. Putting aside their differences and personal drama, they come together to try and achieve a Christmas miracle.

A new chief starts at Station 19. Meanwhile, the crew responds to a young girl seeking help and a call about an SUV flown over a cliff. The crossover continues on Grey's Anatomy S18E09: No Time to Die (II)

Travis and Theo face danger while responding to an emergency at a haunted house. Ben continues his fight for Baby Pru; Vic opens up to Andy; and Station 19 prepares to welcome patients to the Dean Miller Memorial Clinic.

The Station 19 crew offers aid to a man who sets himself on fire. Theo proves his devotion to Vic; Sullivan seeks advice from Dr. Webber; and Travis comes to a realization about his love life.

The Dean Miller Memorial Clinic has its opening day. Meanwhile, Sullivan gives Beckett an ultimatum, and the crew responds to a skydiving incident

Through a series of flashbacks, Sullivan and Natasha’s past is revealed. Meanwhile, Ben and Bailey have a discussion with Pru’s grandparents, and the crew responds to a fire at a candy factory.

The crew at Station 23 faces a difficult goodbye. Meanwhile, Andy meets a charming firefighter, and Emmett invites Travis to have dinner with his parents.

Andy deals with the aftermath of a trauma.

Andy's fate remains unknown as a trial date is set. Meanwhile, Vic and Sullivan are approached by an unexpected guest, and the crew responds to a row of townhouses on fire.

Vic and Theo respond to a domestic disturbance between the parents of a trans teenager; Jack learns shocking new details about his childhood, and Ben and Travis help a clinic patient that’s long overdue for medical treatment.

Andy tracks down a witness to testify at her trial. Meanwhile, Carina and Maya deal with a stressful situation, and the crew responds to a car wreck.

The Station 19 crew jumps into action as a violent tornado rips through Seattle. Amidst the chaos, the team makes a shocking discovery buried under a tree, and Travis' first responder instincts kick into high gear at a political event.

Travis discusses his position in the mayoral race as he is determined to kick Dixon out, and Maya admits to blackmail. Meanwhile, the team is called to a fire at a run-down apartment complex that reveals an unsettling cause.

The Station 19 crew responds to the scene of a car accident where two teenagers are trapped inside of an electric car. The scene grows increasingly tense when the teen’s father shows up furious at his son for taking his beloved car without permission. Ben and Maya find themselves caught in the middle of a domestic dispute involving a couple that they detest

Maya and Theo answer a call at a Halloween carnival; but when fire hits the corn maze, the dangers quickly escalate and Maya risks her own life to prove her worth to her increasingly hostile captain. Meanwhile, Station 19 hosts the neighborhood kids for trick-or-treating; a prank war breaks out in the house, and Jack is haunted by a ghost from his past.

The Station 19 crew works against the clock to rescue a group of employees trapped inside of a malfunctioning battery recycling plant. Carina plans a special surprise in an attempt to reconnect with Maya; Travis gets caught in the crosshairs of dirty politics, and Jack turns up at clinic day only to be confronted with new details about his past.

When a lightning storm crashes a helicopter, the team is drawn away from hosting a fire boot camp for young women, and Natasha calls on Jack to help Vic run the camp instead. As the storm brews outside, things get even more heated inside between Carina and Maya on the fall finale of Station 19.

After a terrifying lightning strike, the Station 19 crew works overtime to extinguish the fire at Meredith Grey's home. Meanwhile, Maya is rushed to Grey Sloan Memorial Hospital due to a medical emergency.

Dixon threatens Natasha in the aftermath of his poor judgement. Meanwhile, Jack is met with disappointment on his first day back. Diane visits Maya, and the team responds to a fire in Theo's old neighborhood.

Theo realizes there is an uptick of fires in his old neighborhood and finds himself returning. At the clinic, Sullivan greets a patient with a large chest burn. Carina treats a pregnant patient who presents her with an offer.

A simulation fire training goes dangerously wrong. Maya tries to make amends, and Bailey encourages Carina to listen. Meanwhile, Jack’s sister shows up at the station with a friend, an injury and an attitude.

The team is forced to make a risky call that could cost them dearly after Tomás’ barbershop catches fire. Diane drops by the station and is called back into action alongside Vic and Carina. Beckett makes a decision about his future.

A call from a social media star’s livestream sends the team on an unusual rescue. Travis’ mayoral campaign takes off, much to his chagrin. Back at the station, Ben treats a patient with a surprising diagnosis.

The crew finds themselves in the middle of a family dispute and a renovation that’s gone off the rails. Ben crashes as Bailey and Carina go undercover at a crisis pregnancy center. Travis preps with Eli for a mayoral town hall.

Emotions boil over at the station as the team chafes against Theo’s leadership style. Carina enlists Ben and Maya to help her with a patient in an uncomfortable position. Natasha and Sullivan’s relationship hits a roadblock.

A shoddily assembled structure poses a dangerous challenge for our heroes leaving Ben with a difficult choice to make. Maya and Carina work to get their relationship back on track, while Natasha must decide what – or whom – she wants to prioritize.

The team responds to a tragic freeway pileup. Andy helps Natasha face the fallout of a recent decision just as Ben deals with the fallout of his own.

It’s election day at Station 19, with all eyes on the mayoral race. Andy, Theo and Sullivan vie to be named captain, and Vic forges an unexpected bond after going rogue.

The Station 19 crew trade in their turnouts for tuxes and gowns as they attend the Firefighters Ball, but when disaster strikes, they jump into action to save the day.

Andy steps into the station’s captaincy as Jack's life hangs in the balance. The team is called to a hostage situation. Natasha fights for her career, and Maya and Carina make a choice.

Ben and Theo respond to a challenging Crisis One call, and Jack struggles adjusting to his new reality. Maya and Carina treat a nanny with a surprising diagnosis. Travis finds a surprise at Dixon's wake, and Vic joins Beckett at a family funeral.

The Station 19 crew struts their stuff at the FABruary Winter Pride parade, where Maya encounters someone important from her past. Carina looks to Bailey for support, while Travis and Eli arrive at a crossroads.

The Station 19 team faces a grueling 24-hour shift that threatens to split them apart. Andy must make an impossible decision, and Maya and Carina navigate new parenthood.

Andy Herrera earns her captain's stripes as she fearlessly leads her team during a life-or-death emergency at Seattle's most beloved landmark. Vic struggles with emotional burnout, and Maya helps Carina navigate some difficult news.

With both Vic's job and Crisis One in jeopardy, a flashback shows how the program has changed the lives of the team and the local community. Meanwhile, Ben keeps a secret from Bailey.

The crew responds to a call at a local park, only to have their assumptions challenged by the Tulalip Tribe when they arrive. Meanwhile, Maya confronts her past, and Carina goes on the offense.

Station 19 uses its clinic to care for asylum seekers who have been bussed in from out of state. Meanwhile, Natasha gets a visit from her sister, and Vic receives surprising news.

When a wildfire threatens Seattle, the crew must jump into action to save their city. Meanwhile, as the station undergoes changes, Andy contemplates the future.

As Station 19 continues to battle an existential wildfire, the team grapples with the possibility of a future that will be changed forever.