CHICAGO FIRE Season 4 Episode 1 Images: “Let it Burn”

Chicago Fire returns for a fourth season tonight, with “Let it Burn,” an episode that promises shakeups on squad, new faces and a life-changing surprise for Dawson.

Catch our full gallery from the premiere after these official loglines for the episode.

SHAKEUPS STIR THINGS UP AT FIREHOUSE 51 ON THE SEASON FOUR PREMIERE

Casey (Jesse Spencer), who is at the center of an undercover operation to bring down a trafficking ring run out of Nesbitt’s (guest star Eric Mabius) strip club, finds himself in very dangerous territory.

Meanwhile, as a result of the high turnover rate on squad, Severide (Taylor Kinney) gets a rude awakening when Capt. Dallas Patterson (guest star Brian White) is brought in, much to Boden’s (Eamonn Walker) dismay.

Dawson (Monica Raymund) confirms her suspicions that her life is about to change forever and Jimmy Borrelli (guest star Steven R. McQueen), the new candidate, makes an unusual first impression.

Elsewhere, citizens of Chicago band together to take charge of their neighborhood in protest of a drug den in their area, resulting in ramifications that severely hinder members of Firehouse 51, who are called to the scene to battle a blazing fire.

Chicago Fire returns Tuesday October 13 (10:00PM – 11:00PM) on NBC.

CHICAGO FIRE -- "Let It Burn"

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CHICAGO FIRE -- "Let It Burn" Episode 401 -- Pictured: Jesse Spencer as Matthew Casey -- (Photo by: Elizabeth Morris/NBC)