The first season of Chicago Fire premiered on October 10, 2012 on the NBC channel in the United States.
This season concluded on May 22, 2013 after 24 episodes had been aired.
This is the plot for Season 1 only. For the plot for the entire show, see: Chicago Fire.
After the death of Andrew Darden in the pilot episode, many friendships are strained in the firehouse because each of the lieutenant blamed one-another for his death.
Andrew's wife however, blamed Kelly Severide and stated "he only wanted to be a firefighter because you was".
When Christopher Herrmann is involved in an accident and is seriously injured, nearly killed... The firehouse start to understand that accidents happen and they all need each others support through tough times because anger and upset just cause arguments and more accidents.
The series is filmed in Chicago, Illinois, U.S. The Mayor of Chicago appears in the Pilot episode, when asked what it was like the Mayor commented "It's easier being mayor than playing mayor. I told them I'd do it under one condition: the TV show is making an investment to the Firefighters' Widows and Orphans Fund".
On January 29, 2013, Chicago Fire had it's episode total increased from 22 to 23. One week later, the show received one more episode finally totalling 24 episodes.
- Jesse Spencer as Lieutenant Matthew Casey
- Taylor Kinney as Lieutenant Kelly Severide
- Monica Raymund as Paramedic in Gabriela Dawson
- Lauren German as Paramedic Leslie Shay
- Charlie Barnett as Firefighter Candidate Peter Mills
- Eamonn Walker as Battalion Chief Wallace Boden
- David Eigenberg as Firefighter Christopher Herrmann
- Teri Reeves as Doctor Hallie Thomas
- Yuri Sardarov as Firefighter Brian Zvonecek
- Joe Minoso as Firefighter/Chauffeur Joe Cruz
- Christian Stolte as Firefighter Randy McHolland
- Jon Seda as Detective Antonio Dawson
- Robyn Coffin as Cindy Herrmann
- Jason Beghe as Detective Hank Voight
- Mo Gallini as Firefighter Jose Vargas
- William Smillie as Firefighter Kevin Hadley
- Randy Flagler as Firefighter "Capp"
- Anthony Ferraris as Firefighter "Tony"
- Chaon Cross as Heather Darden
- Jeff Lima as Leon Cruz
- Linda Powell as Ingrid Mills
- Alexandra Metz as Elise Mills
- Shiri Appleby as Clarice Carthage
- Treat Williams as Benny Severide
- Nicole Forester as Christie Casey Jordan
- Kathleen Quinlan as Nancy Casey
- Cody Sullivan as Ernie