Kelly Thiebaud

The BAU goes to Atlanta to investigate a series of murders, which they believe are being committed by more than one unsub.

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

The new Seattle fire chief is introduced to Station 19 and leaves the crew skeptical; a department store fire caused by exploding fireworks triggers painful memories from Ben's past and inspires him to pursue a new endeavor.

While Pruitt grieves a monumental loss, Andy refuses to do the same and, instead, throws herself into work; the crew responds to a widespread carbon monoxide leak; Sullivan makes a controversial choice for captain.

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

Maya and Theo answer a call at a Halloween carnival; Station 19 hosts the neighborhood kids for trick-or-treating; a prank war breaks out in the house; Jack is haunted by a ghost from his past.