In Chicago Fire season 12 episode 4, “The Little Things,” several characters’ stories were connected to the major case of investigating arson and dealing with a family in trouble:
In episode 4 of season 12 of Chicago Fire, Severide (Taylor Kinney) liked his job as an arson agent for the ATF and thought about moving to OFI full-time. He talked about this idea with Kidd, who agreed with him. At the same time, Cruz said he wanted to move up in his job and take the lieutenant’s exam.
When the team got to a garage where there was a fire, they found a girl named Harper hiding. Even though there were differences in the firehouse, Kidd looked into the fire further because he thought strange things were going on around it.
Brett thought about asking Boden (Eamonn Walker) to be the officiant at her wedding, but Boden’s grandson James called for help with his mother Shonda, who had been arrested. Even though Shonda’s position was very bad, she refused Boden’s help, admitting she was wrong.
Kidd’s research showed that Harper’s neighborhood had a pattern of arson, and Harper was a suspect in more than one case. Kidd asked social services to help because he was worried about the girl’s safety, but Harper’s mother refused to let anyone in.
When Harper set fire to her own house, her mother Alicia fell out of a window and hurt herself. Kidd and her team ran to help Harper, who said she wasn’t pushing her mother and was sorry for starting the fire. It was very bad that Alicia was hurt, and Harper could have been sued for what she did.
In the middle of all the chaos, James made peace with Boden by telling him he trusted him. At the same time, Cruz found a mistake with Brett’s wedding invitation, which caused some funny confusion.
Harper and her family were still having problems at the end of the episode, which showed how complicated and hard things can be for both firefighters and the towns they serve.