Andy, Sullivan, Dean and Ben are faced with a tough choice while trying to save a couple trapped in their car. Meanwhile, Dean second guesses his legal fight against the Seattle Police Department; Travis’ dad fears he will be outed when his “golfing friend” is exposed to COVID-19; and Carina’s immigration status is called into question.

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.

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)

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 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.