NBC | 9:00 pm
"Rattle Second City" opens Season 9 of this action drama, as the Firehouse 51 team welcomes a new member whose presence could lead to some complications. Brett (Kara Killmer) gets a chance to shine as a leader when a call takes a scary turn. Sensing a great potential in Kidd (Miranda Mayo), Boden (Eamonn Walker) makes a proposal that could have lasting repercussions for the team. Jesse Spencer and Taylor Kinney also star.