Prove It

A Problem House. An arsonist takes notice of Severide as new red tape causes big changes in the department in the Season Two Premiere.

Prove It. The threat of an arsonist with a vendetta against the firehouse looms and Casey struggles with the repercussions of Heather Darden's accident.

Defcon 1. Severide is convinced he knows the arsonist's identity.

A Nuisance Call. Internal issues threaten to derail Engine Company 51.

A Power Move. The future is uncertain for more than just Boden and Firehouse 51.

Joyriding. A physical workout turns mental for Severide.

No Regrets. The firehouse is tested to the limits when called to the scene of an epic railroad accident and Boden ponders his future.

Rhymes With Shout. A drive-by shooting hits close to home for Cruz and his brother.

You Will Hurt Him. Boden is left to wonder where things stand for Firehouse 51 as McLeod exerts her influence.

Not Like This. The Firehouse is set to close, but 51 is not going down without a fight.

Shoved in My Face. Casey gets back to work after his brush with death.

Out With a Bang. Casey forges ahead at the Firehouse despite signs that he may not be fully recovered from his harrowing accident.

Tonight's the Night. Firehouse 51 steps in when a blackout causes chaos in the community.

Virgin Skin. Despite the mystery surrounding Katie, life moves forward at the Firehouse.

Keep Your Mouth Shut. Despite his frustration, Severide remains hopeful that justice will be served.

A Rocket Blasting Off. With Keeler's whereabouts unknown, the men of Firehouse 51 are looked at as prime suspects.

When Things Got Rough. A Chicago civilians heroic action hits the firehouse in more ways than expected.

Until Your Feet Leave the Ground. Away from the action, new bonds form and old ones strengthen.

A Heavy Weight. Firehouse 51 struggles in the wake of a recent tragedy.

A Dark Day. An explosion at a Chicago hospital rocks the city.

One More Shot. Change is on the horizon at 51, but forgetting the past can be hard.

Real Never Waits. A call to a boarding school leaves Severide questioning himself and Dawson's training is put to the test in the Season Finale.