1. Sacred Ground

The mattress factory fire spirals out of control. Truck and squad lay it on t...

2. A Real Shot in the Arm

Casey struggles to get Boden to sign off on an energetic new recruit; Foster ...

3. Badlands

Brett and Foster question the suspicious circumstances surrounding an attack ...

4. Infection, Part I

A deadly bacteria takes its toll on numerous victims around the city, leaving...

5. Buckle Up

Kidd must prove herself at the National Firefighter Leadership Conference, wh...

7. Welcome to Crazytown

Severide must make a tough decision about the future of his career at Firehou...

8. Seeing Is Believing

Severide begins his assignment at the Office of Fire Investigation and gets o...

9. Best Friend Magic

An unexpected visit throws Casey for a loop. Severide sets out to exonerate a...

10. Hold Our Ground

Members of Firehouse 51 are dismayed to learn their boundaries have been redr...

11. Where We End Up

A pest control problem forces the 51 team to temporarily bunk with Firehouse ...

12. Then Nick Porter Happened

A series of false alarms at a private school hinders the firehouse's ability ...

13. A Chicago Welcome

The surprising arrival of a new fire truck brings both joy and chaos to membe...

14. Shut It Down

A series of mysterious gas leaks has members of Firehouse 51 puzzled and spre...

15. Off the Grid

A series of teen Opioid overdoses sees Severide partner with Sean Roman, but ...

16. The Tendency of a Drowning Victim

Boden is on edge after starting a new fad diet. Casey and Severide disagree o...

17. Protect a Child

Things get personal for Casey and Gallo in the aftermath of a suburban house ...

18. I'll Cover You

Lt. Severide teams up with Seager and the OFI when a motel structure fire tur...

19. Light Things Up

Tension builds when a group of rabble-rousers attempt to lock down the fireho...

20. 51's Original Bell

When one of 51's own gets injured on a call, Lt. Severide becomes obsessed wi...