: Candidate Peter Mills struggles with the choice between his commitment to the fire department and helping his mother with the family restaurant. Significant Moments
: Kelly Severide learns he has a fractured vertebra but chooses to hide the severity of his injury and use painkillers to keep working.
: Casey refuses to be intimidated by Voight , officially filing the report and setting off a multi-episode rivalry that defined the show's first season.
: Characterized as a "dirty cop" from the start, Voight uses threats and intimidation to protect his son, Justin.
![[S1E3] Professional Courtesy](https://www.st-lab.com/upload/202202/18/202202181734401517.jpg)
![[S1E3] Professional Courtesy](https://www.st-lab.com/upload/202202/18/202202181734460580.jpg)
![[S1E3] Professional Courtesy](https://www.st-lab.com/upload/202202/18/202202181737166674.jpg)
: Candidate Peter Mills struggles with the choice between his commitment to the fire department and helping his mother with the family restaurant. Significant Moments
: Kelly Severide learns he has a fractured vertebra but chooses to hide the severity of his injury and use painkillers to keep working.
: Casey refuses to be intimidated by Voight , officially filing the report and setting off a multi-episode rivalry that defined the show's first season.
: Characterized as a "dirty cop" from the start, Voight uses threats and intimidation to protect his son, Justin.