Episodes
1. Kicking Down Doors
8.9
October 1, 2025
43 min
A new face at Firehouse 51 causes tension, while rising chaos in the city brings new challenges to the team. Herrmann stalls on plans of relinquishing his office to Mouch.
Guest Stars:
Dermot Mulroney, Anthony Ferraris, Randy Flagler, Samuel B. Jackson, Joe Daru
2. Primary Search
7.0
October 8, 2025
43 min
Vasquez fights to prove himself at 51. Violet and Novak pursue a troubling mystery. Herrmann is on a quest to keep Molly's profitable.
Guest Stars:
Anthony Ferraris, Randy Flagler, Joe Daru, Kierra Bunch, Hero Hunter
3. All in the Blood
7.0
October 15, 2025
43 min
When city budget cuts stretch crews thin, Pascal takes matters into his own hands. Vasquez looks to an old friend for help. An incident in the field hits close to home for Violet.
Guest Stars:
Dermot Mulroney, Anthony Ferraris, Randy Flagler, Laura Allen, Annabeth Gish
4. Mercy
9.3
October 22, 2025
43 min
Firehouse 51 must band together after a devastating fire catches them off guard. Vasquez continues his quest for answers. Violet and Novak face an unexpected roadblock in the new training protocol.
Guest Stars:
Tim Hopper, Robyn Coffin, Anthony Ferraris, Amanda Calabrese, Randy Flagler
5. Ghosts
7.5
October 29, 2025
43 min
Cruz hunts for the identity of an unknown ally. Mouch takes steps to help a friend. Vasquez must make a difficult choice.
Guest Stars:
Robyn Coffin, Anthony Ferraris, Randy Flagler, Marcus Emanuel Mitchell, Gonzalo Menendez
6. Broken Things
8.8
November 5, 2025
43 min
A traffic jam forces Violet and Novak to take drastic measures to save a patient. Severide shadows Pascal for a day. Kidd goes the extra mile for Isaiah.
Guest Stars:
Dermot Mulroney, S. Epatha Merkerson, Annabeth Gish, Hero Hunter, Gonzalo Menendez
7. Pierce the Vein
8.6
November 12, 2025
43 min
Severide investigates a suspicious high school fire. Novak gets an unexpected call. Violet brings a 51 firefighter onboard the ambulance for a shift.
Guest Stars:
Dermot Mulroney, Tim Hopper, Anthony Ferraris, Randy Flagler, Annabeth Gish
8. A Man Possessed
7.0
January 7, 2026
43 min
When an act of arson harms someone close to the Firehouse 51 family, Severide must track down the perpetrator. Impending budget cuts push Mouch and Pascal to get creative.
Guest Stars:
Dermot Mulroney, Tim Hopper, Anthony Ferraris, Randy Flagler, Steven Weber
9. Crime of Passion
9.4
January 14, 2026
43 min
A member of the Firehouse 51 family remains in peril. Cruz lends a hand to Severide in the ongoing investigation.
Guest Stars:
Dermot Mulroney, Tim Hopper, Joe Daru, Isaac Stephen Montgomery, Hero Hunter
10. Carry a Torch
8.0
January 21, 2026
43 min
Novak explores a new romantic connection. Vasquez deals with the aftermath of his father's recent release.
Guest Stars:
Robyn Coffin, Anthony Ferraris, Randy Flagler, Darren Barnet, Marcus Emanuel Mitchell
11. Frostbite Blue
January 28, 2026
Herrmann grows uneasy when a local accident attorney inserts himself into a routine call. Firehouse 51 gets a visitor.
12. Coming in Hot
February 4, 2026
Pascal finds himself under intense scrutiny when a member of the firehouse is injured on a call. Herrmann grapples with family issues.
13. Episode 13 (I)
March 4, 2026
Firehouse 51 is called to an airfield when a passenger jet suddenly goes silent mid-air, triggering a high-stakes emergency. Their discovery cracks open a bigger and deadlier mystery — one with consequences that could ripple far beyond the runway and put countless lives in jeopardy. The crossover continues on Chicago Med S11E13 (II) and Chicago P.D. S13E13 (III).
Guest Stars:
Dermot Mulroney
