Following a deadly blaze inside a coffee beanery, the members of Station 19 find themselves on high alert as a beloved member of their team lands at Grey Sloan, leaving the future uncertain in the face of a life-threatening situation. The crossover starts on Grey's Anatomy S15E23 What I Did for Love (I)

Andy becomes painfully suspicious of the circumstances surrounding her mother’s death and goes to her aunt looking for answers. Meanwhile, the members of the crew work to evacuate a doctor from Pac-North hospital and find themselves in a life-threatening situation; and Sullivan undergoes surgery for his chronic leg pain.

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.

Following a life-threatening situation that left the future of a member of Station 19 unclear, the crew gathers to face the outcome. Andy and Ben respond to a man impaled by a chandelier. Meanwhile, Station 19 is called upon to organize shipments of supplies and assist with wildfires in Los Angeles.

Andy deals with the aftermath of a trauma.

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 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.

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 Ben readies the new Physician Response Team truck for the field, his suspicions about Sullivan and the missing Fentanyl continue to grow. Meanwhile, Jack and Rigo try to look past their differences when they are forced to work together and fight a mysterious gas station fire; Dean and JJ try to work through their differing parenting styles; and Travis meets someone new.

While at a lunch seeking Pruitt’s blessing for their relationship, Andy and Sullivan jump into action when ICE attempts to raid the restaurant. Meanwhile, Travis gets roped into an awkward lunch with Chief Dixon, Emmett and Emmett’s girlfriend; and Ben invites Grey-Sloan Memorial surgeons Owen Hunt, Teddy Altman and Jackson Avery to get a sneak peek of the new PRT vehicle.

The Station 19 crew battles a storage facility fire with growing complications, and Dr. Jackson Avery pops over from Grey Sloan and ends up collaborating with old pal Ben Warren.

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.

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

When Station 19 gets called to a structure fire at a coffee processing plant, the team risks their lives to save Station 42’s captain. Meanwhile, Ripley and Vic consider a shocking option to save their relationship; Andy gets some surprising news about some of her fellow crew members, and Pruitt takes on a new position.

Ben reaches a new milestone as a rookie and, as is tradition, receives something from the crew. Chief Ripley holds final interviews for the role of captain but is interrupted when the team is called to a massive skyscraper fire, causing several lives to hang in the balance.

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)

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.

As the team gathers for a Friendsgiving celebration at Dean’s, a violent windstorm touches down in Seattle. As the storm picks up speed, creating dangerous fire conditions, the crew must put the festivities on hold and report for duty, leaving some of them in a life-threatening situation.

Jack and Maya are called to treat people stuck in a subway train and discover a potential threat to the passengers and themselves. Meanwhile, Travis, Ben and Dean get pressured into inviting Sullivan to help repaint walls in Travis’ house and come to a surprising conclusion about Sullivan.

The members of Station 19 pack their gear and head to Los Angeles, California, to help battle a deadly wildfire raging out of control. While the team works to evacuate residents, they meet Terry, and Ben makes a split-second decision that changes both of their lives.

While struggling to help victims of a crash on a desolate road, Vic finds the courage to confront a difficult situation. Meanwhile, Ben prepares to go out for Medic One, causing some concern over his current Station 19 responsibilities, and Pruitt spends time with a special someone.

Maya addresses some unresolved family issues, and the crew takes matters into their own hands when faced with a life-or-death moment on scene. Meanwhile, Andy and Sullivan’s marriage is put to the test.

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.