After tearful goodbyes to his wife, LAPD Sergeant Athena Grant (Angela Bassett), and surrogate son Buck (Oliver Stark), Bobby died while praying behind protective glass.
The episode, titled “The Last Alarm,” opens with an eight-year-old flashback showing Bobby and his crew responding to a house fire. Though they manage to save the mother, Leah, they tragically fail to rescue her infant son, Mika.
In the present, Athena struggles to plan Bobby’s funeral while waiting for the department to release his body. Tensions rise when she discovers that Chimney has been persistently calling about the delay, prompting a confrontation. Athena fears that once Bobby is buried, people will begin to move on — something she’s not ready to do.
Athena unexpectedly crosses paths with Leah, who now believes Mika was kidnapped during the fire and is still alive. Though initially hesitant, Athena reopens the case to honor Bobby’s memory. After exhuming Mika’s grave and conducting a DNA test on a boy Leah suspects is her son, it’s confirmed the child is not Mika, leaving Leah devastated.
The episode closes with Bobby’s funeral, attended by the entire Station 118 crew, including Eddie (Ryan Guzman), who returns for the occasion. Athena then accompanies Bobby’s casket to St. Paul, Minnesota, where he is buried beside his first wife and two children. “Rest easy, you’re home now, baby,” she says as the screen fades to black.