Ben and Jack mollify a group of homeless foster and biological siblings so they can help save a life, triggering memories from Jack’s past. Meanwhile, Maya pushes the team too hard and struggles to bring them together; and Pruitt threatens to take drastic action when refused a request.

After some tense and traumatic experiences, the firefighters get a visit from a psychologist .

Andy returns to work while she and Jack fight to save people trapped in a collapsing bowling alley. Meanwhile, Ben confronts Sullivan about his drug problem; and Maya’s mother, Katherine, pays Maya a visit.

When the COVID-19 pandemic hits Seattle, the Station 19 crew leans on each other for support. Andy tries to make sense of her mother’s return, while Sullivan settles into a new routine. And it’s all-hands-on-deck when a group of teenagers unintentionally starts a wild fire.

Andy takes the day off to continue to sort out her family life; Maya and Carina do their best to maintain their relationship while unable to physically see each other due to COVID-19 restrictions, and Sullivan strives to work on his sobriety. Meanwhile, the team responds to a call involving a wild animal.

Andy and Sullivan find a way to stay connected; Ben confronts a tough loss, and Jack and Inara grow closer. Meanwhile, while off duty, the crew jumps into action to help a mother in distress, but their heroic efforts spark conflict with police officers who are less than eager to offer support.

In the wake of national outcry after the tragic murder of an unarmed Black man, Maya brings in Dr. Diane Lewis to grief counsel the team.

Ben and Dean wrestle with life and death after the Black Fighter’s Coalition banquet.

Ben finally faces the health issues he has been putting off. Meanwhile, Jack and Inara help their neighbor out of a trashy situation, and Carina and Maya reevaluate their relationship.

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

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.

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.

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.

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.