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An overzealous reporter's accusation leads a despondent new mother (Ashley Williams) to kill herself; detectives continue to search for the mother's missing child as time gets shorter.

The theft of fertilized embryos from a sperm bank leads the detectives to two publicity-hungry extremists.

DNA evidence points to Benson as the prime suspect when the sexually mutilated body of a member of a biker gang is found in the park; Stabler fights to prove his partner's innocence.

Detectives try to identify a girl who is so traumatized after being raped that she cannot tell them her name.

Cruz forms a bond with a young immigrant boy he meets while fighting an apartment fire; Squad makes plans to prank the newest member of their team; Hawkins and Violet struggle to keep their relationship a secret.

Severide and Kidd work with CPD regarding a suspicious car wreck; Hawkins and Violet's relationship is in jeopardy; Chloe and Cruz adjust to a new family dynamic.

Firehouse 51 must band together when one of its own is taken hostage.

Firehouse 51 tackles a fire caused by a dropped jet engine, and one of their own is accused of a theft related to the incident; Kidd and Boden disapprove of Kylie's potential new love interest.

A family friend asks Herrmann for some advice on opening a bar; tensions run high between Emma and Violet; Kidd struggles to keep her team together.

Mouch and Ritter work together to solve a murder mystery; Severide and Cruz tackle a food truck fire; Gallo goes to see Hawkins about Violet.

The big wedding day arrives and Firehouse 51 welcomes Casey back to celebrate the joyous occasion; Emma's plans to replace Violet come to a shocking end.

Kidd and Severide's honeymoon is interrupted by a dangerous person from their past; Kidd's former academy classmate joins Firehouse 51; Brett and Violet reflect on their relationships.

Javi spends a couple of shifts at Firehouse 51; Kidd and Carver work together to help Carver's former boss; as Hawkins and Violet's relationship blossoms, Gallo turns his attention elsewhere.

Kidd recruits Carver, Capp and Tony to help prepare her new lieutenant's quarters; Severide and Detective Pryma reluctantly pair up to work a police investigation; Firehouse 51 comes together to fight a movie theater fire.

Kidd gets a glimpse into Carver's chaotic personal life; Mouch and Herrmann receive an unexpected gift.

Firehouse 51 hosts a Halloween open house; Kidd and Severide help a young girl after she gets kicked out of her home.

Severide and Kidd investigate an explosion at a jewelry store; Cruz and Chloe take steps to make Javi a permanent part of their family; Gallo, Ritter and Mouch try to bond with Carver.

Herrmann is tasked with fulfilling a man's dying wish; Kidd reflects on her Girls on Fire program after one of her students graduates from the Fire Academy; a heckler harasses Firehouse 51.

The Superstars of World Wrestling Entertainment display their skills and athleticism in weekly episodic programming, as scores are settled and enduring rivalries play out in the ring.

Detective Pryma asks for Severide's help on a case involving explosives; Gallo and Carver clash.

Severide struggles with the cost of helping Det. Pryma with the Martucci case; Gallo campaigns for Herrmann to represent 51 at the National Firefighter's Association's Winter Conference; a familiar face makes a shocking return.