Chicago Fire is an American drama series that premiered on NBC on October 10, 2012. It’s part of the One Chicago franchise which also includes Chicago P.D., Chicago Med, and Chicago Justice. The show focuses on the lives of firefighters, paramedics, and other staff working at Firehouse 51 in Chicago.
Rachel Nichols joined the cast Chicago Fire season 4 in 2015 playing Jamie Killian. Jamie was a lawyer who got involved with Kelly Severide.
She worked at a prestigious law firm and her relationship with Severide became complicated after she discovered her firm was representing a corrupt real estate mogul.
This discovery dragged her into the ongoing issues surrounding Firehouse 51.
Though her time on the show was brief, Rachel Nichols brought a solid presence to the character. Her role helped elevate some of the show’s more intense moments and she played a pivotal part in the drama during her time on the series.
Everything you need to know about Rachel Nichols' Jamie Killian in Chicago Fire

Rachel Nichols played Jamie Killian in Chicago Fire season 4, appearing in a total of six episodes, from episode 1 (Let It Burn) through episode 9 (Short and Fat). Jamie Killian was introduced as a lawyer from a high-end Chicago law firm.
Right from her first appearance, viewers learned Jamie was in a relationship with fan-favorite firefighter Kelly Severide, but their connection quickly became complicated because of her career choices and personal morals.
In the season premiere, Let It Burn, Jamie initially seems genuine and supportive, making viewers hopeful about her relationship with Severide. However, things change fast once her work and Severide’s duties at Firehouse 51 collide.
Jamie's law firm represented a controversial client named Roger Maddox, a wealthy and powerful real estate developer who was known for unethical practices.
When Severide learned about Jamie’s involvement in Maddox’s case, tensions started rising between the two. Jamie's career was on the line if she didn’t play by her firm’s rules, creating a difficult choice for her.
As the episodes progressed, Jamie found herself in deeper trouble. In episode 2, A Taste of Panama City, Severide became more skeptical when he realized Jamie had been indirectly sharing information about the fire department's actions with Maddox.
Jamie insisted she was only doing her job, but her decisions led to frustration and mistrust between the couple.
Things took an even darker turn in I Walk Away (episode 3), when Boden became the target of a set-up by Maddox’s team.
Jamie realized Maddox had hired Serena Holmes, a woman who falsely accused Chief Boden of assault, in an effort to ruin Boden’s reputation. This revelation shocked Jamie, making her realize the consequences of representing a client like Maddox.
Jamie’s role reached a critical point in episode 4, Your Day Is Coming, when she had to confront the ethical boundaries she’d crossed. She was caught between loyalty to her law firm and her relationship with Severide and Firehouse 51.
Her internal conflict became clear, with Jamie acknowledging how severely Maddox’s dirty tactics were hurting the people Severide cared about.
This put tremendous strain on their relationship, making viewers see Jamie’s vulnerable side.

Finally, in episodes 8 (When Tortoises Fly) and 9 (Short and Fat), Jamie had to make some tough choices. Her conscience forced her to reconsider working for Maddox, but she also had to face the reality that standing up to her firm meant risking her own career.
Jamie tried to balance being professional and doing what was morally right, but the damage to her relationship with Severide was already done.
Ultimately, her involvement with Maddox and his unethical behavior ended her romance with Severide, leaving both characters hurt in Chicago Fire.
Chicago Fire's next episode is scheduled to air on Wednesday, March 26, 2025, at 9/8c on NBC.