History Series / ChicagoFire

** When Gabby goes to confront Chief Jones about barring his daughter from becoming a firefighter, which led to her suicide, the look on his face says volumes about how much he regrets his actions. Due to his disappearance in later episodes, it is strongly implied that he may have resigned out of guilt.

* AmbiguousDisorder: Some fans wonder if paramedic Chili Chilton might be slightly bi-polar, although we haven't seen her depressed. We find out later she is trying to deal with the death of her sister, Jelly Bean.

* NoOSHACompliance: One episode as an Amazon-like distribution warehouse floor manager banning bathroom breaks when the staff is apparently being too slow in their quotas compared to the new robots. Of course, nature called for one worker, and he was so desperate and angry that he urinated on one of the robots. That damaged the robot, which went haywire and rammed into the shelving and caused a major collapse on some workers. The firefighters come to the rescue and then investigate what happened. When they discover the manager is at fault (and trying to keep a low profile at that moment), they firmly order him to stay where he is since he is going to have a long talk with OSHA about this blatant workplace reg violation.

* {{Nepotism}}: Jones' father is a high-ranking member of the CFD, and used some leverage to make sure she got through the academy. Played with, in that one she's had some experience as a firefighter he's now trying to use his leverage to get her assigned to a desk job out of danger. [[spoiler: [[DrivenToSuicide It backfires]] ''[[DrivenToSuicide horribly]]'']].

* FirefighterArsonist: Season 2 features the team dealing with as serial arsonist starting fires in buildings considered dangerous for firefighters or having links to the firefighters at Firehouse 51. This inside knowledge leads Kevin Severide to conclude their dealing with a firefighter turned arsonist with a vendetta against the rest of the team. Its eventually to be Kevin Hadley, who was previously [[FaceHeelTurn a member of Firehouse 51]], until believing he was being passed up for a promotion in favour of the rookie Peter Mills, led Hadley to pulling a series of pranks on Mills, each one crueller than the last until they escalated into full blown dangerous and disruptive behaviour forcing Chief Boden to transfer Hadley out. Furious he vowed revenge on the others, engaging in a series of mind games and attacks until he's eventually caught by Severide.

** When Gabby goes to confront Chief Jones about barring his daughter from becoming a firefighter, which led to her suicide, the look on his face says volumes about how much he regrets his actions. Due to his disappearance in later episodes, it is strongly hinted that he resigned out of guilt.
** Slightly inverted in "Where the Collapse Started." Antonio tells Casey that he (Casey) has been stringing Gabriela along for three years, and needs to either make a serious commitment or let her go.
** Cruz to Gallo regarding new paramedic Gianna in "Rattle Second City." Cruz isn't Gianna's brother, but they did grow up on the same block. Gallo was just being friendly but Cruz doesn't care.

* EmbarrassingHospitalGown: [[LampshadeHanging Lampshaded]] in "Who Lives and Who Dies". When Severine visits Anna in the hospital, she teases him about how he was hoping to find her in a backless hospital gown and catch an eyeful, but she's actually wearing a very modest robe.

'''Severine:''' You figured it out.\\

-->'''Cruz:''' Can't they zoom and enhance?
-->'''Otis:''' Sure, if you want it to be blurrier.

** Late in Season 3, Cruz moves from Truck 81 to Squad 3 to fill the near-constantly empty slot most recently vacated by Peter Mills.

* DisproportionateRetribution: Done in "Short and Fat," twice humorously and once seriously. When Chili and Jimmy are a minute late to a meeting, Peterson puts them on garbage duty for a week. When Peterson catches them coming out of the same [[ShowerOfLove shower stall]], Peterson ups that to a month. At the end of the episode, when Hermann compares new hire Freddy to Molly's "short and fat" highball glasses, Freddy [[spoiler: stabs him in the side and leaves him bleeding out in the kitchen.]]

''Chicago Fire'' is an Creator/{{NBC}} drama series, and the first show of Creator/DickWolf's ''Series/OneChicago'' Franchise, that premiered in October 2012. It focuses on the fictitious Firehouse 51 of the Chicago Fire Department, which houses Battalion 25, made up of Ladder Company 81 (headed by Lt. Casey), Rescue Squad 3 (headed by Lt. Severide), Ambulance 61, and Engine Company 51.