Having been thrust into a dark place from where it looks likethere is no coming back, Banks' mission to solve Annie'smurder is made all the harder by the fact he has been taken offthe case and sent on gardening leave – but that won't stophim. While his old team struggle, Banks operates for the firsttime on the other side of the law, using his years ofexperience, wits and wisdom to secure the all-importantbreak-through. It finally looks like Banks has done theimpossible and is on the verge of bringing crime boss SteveRichards to justice when the case takes an unexpected twist,sending Banks and the team back to square one. Will Banks beable to come out on top after an explosive confrontation withRichards – he needs to try and begin to rebuild his shatteredworld.
Helen is determined to try and win back Banks's approval asthey attempt to discover the true identity of student Josh'smurderer and stop his father from seeking a revenge of his own.
It's all hands on deck when Firehouse 51 races to the scene ofa deadly chemical leak inside an industrial building. Withsquad and truck tested like never before, scores of workersare rescued but many are experiencing respiratory distress.This prompts truck 81, squad 3 and ambulance 61 to spring intoaction to transport the victims to nearby Chicago Med. Thesituation takes a turn from bad to worse in the midst of thechaos when a "patient" planted inside the hospital goes on asuicide mission armed with a grenade and claiming to be thecarrier of a deadly airborne disease. Trying to stop the madmanfrom engaging the explosive device, a member of the firehouseteam is severely wounded in the blast and left to facelife-threatening injuries. With no other choice, Chicago Medis forced into lockdown until doctors and the Hazmat team candetermine the severity of the airborne virus.
A self-proclaimed "nightlife expert" afflicted by mounting debtand a ballooning ego butts heads with Jon Taffer as he battlesto show him the error of his ways.
With only a few days before Joe Carroll's execution, Ryan andMike shift their focus to a new threat. Meanwhile, after beingapproved to start work again, Max rejoins the task force andcomes dangerously close to a deadly menace.
The results are announced from last week's performances as 1Celebrity and their Professional dance partner are eliminatedfrom the competition. The celebrities perform live for the 4thtime hoping to impress both the judges and the viewers at home.