Sophia Bush | Chicago P.D. | Season 3

"Life Is Fluid"

The Intelligence unit tracks down one of Chicago's most wanted fugitives, which leads to Halstead being abducted and tortured when the leader of the group responsible wants the identities of all of Intelligence's confidential informants as ransom. Meanwhile, Lindsay continues to make bad choices, but gets called in by Olinsky to help Halstead. Also, Olinsky opens up to Platt about his secret daughter, while Roman shows concerns about Burgess' engagement to Adam.

"Natural Born Storyteller"

Burgess and Roman discover a child found murdered in an abandoned house while on a call. Meanwhile, Voight asks Halstead to keep an eye on Lindsay as she continues her recovery. Also, Burgess questions Roman about a needle she found in Roman's jacket, and Olinsky tries to get closer to his newly discovered daughter.

"Actual Physical Violence"

A man whose daughter is missing takes a member of the team hostage. In other events, Voight learns that Bunny has made new accusations regarding an old case; and Antonio is shocked by a secret that Olinsky has been keeping.

"Debts of the Past"

The team goes after an ex-con who murdered an officer and tried to take out Voight and his family. Elsewhere, Burgess starts to have doubts about her engagement to Adam after finding out that he has been engaged more than twice. Also, Olinsky continues to bond with his new daughter.

"Climbing Into Bed"

Ruzek finds himself in hot water when his unauthorized undercover operation ends with a missing gun-wielding psychopath on the loose, a restaurant owner's wife dead and more questions than answers. While on suspension, Ruzek struggles with guilt after his CI is found dead. Lindsay moves back into her apartment for good.

"You Never Know Who's Who"

Burgess and her rookie find a dead man with supposed links to the CIA inside his bullet and bomb-proof SUV. At the man's home they find a bunker with a large supply of weapons. When the man's body is stolen from the morgue they catch a man who claims to be CIA and working as part of a domestic program called "Street Cleaner". It is found that the man, whom they identified as Victor Cullen, was in fact CIA but several years before and only for a short while before suffering a mental breakdown. He had in fact been diagnosed as delusional and had used a large inheritance to fund his personal team of pseudo-CIA agents, information Dr. Daniel Charles of Chicago Med later reveals to the team. The captured man leads them to the other two "agents" with Olinsky posing as a contact from CIA headquarters. At the meeting one of the men is killed and another is apprehended after Atwater disables his special SUV using a city snowplow. Meanwhile, Ruzek's career is saved when Platt calls in a favor on his behalf, and Halstead and Lindsay take their relationship to the next level.

"A Dead Kid, a Notebook and a Lot of Maybes"

The Unit investigates the death of a prep school student who was planning to bomb his school. They track down his partner and eventually uncover that the boys were molested by their swim coach and only planned to get back at him by blowing up his car. It is found that the dead student was in fact murdered by a man hired by the swim coach to cover up his crimes. The case gets personal for Halstead and he bonds with the young victim. Meanwhile, Olinsky's wife throws him out over his refusal to abandon his new daughter, leading him to move in with Ruzek, interrupting a date with Burgess. Also, Atwater tries to get in good with a legendary police captain from another district.

"Forget My Name"

The Intelligence Unit receive a tip from a reliable source about a major drug trade which also leads into a murder investigation of a government official. Meanwhile, Mouch asks Burgess for Platt's ring size so he could surprise her with a marriage proposal.

"Never Forget I Love You"

The team investigates a body of a stripper found in Lake Michigan who has connections to Voight's social circle in Chicago and causes tension between him and Lindsay. It was later revealed that the victim was pregnant and it is suspected that the killer was the father of the child. Meanwhile, Roman makes a mistake that causes him to feel guilty.

"Now I'm God"

The case of cancer-free patients being overdosed on chemotherapy takes a turn when it is revealed that the doctor responsible treated the late wife of Voight. Distraught over this, Voight does everything he can to convict him. Meanwhile, Burgess investigates an incident that got Roman suspended.

"Knocked the Family Right Out"

The team investigates a home invasion in which the suspects put a gas in the house and knocked the victims out. The investigation turns into a rape case because one of the female victims was raped by one of the suspects. When the Chicago P.D. believes they have caught a suspect, another home invasion occurs and the female is raped again. Lindsay questions the victim, which leads to a trap and Lindsay is kidnapped. Meanwhile, Voight helps his old cellmate restart his life after he is released from prison.

"Looking Out for Stateville"

The Intelligence unit investigates and tries to break up a cocaine ring with the help of Voight's old cellmate who makes him a personal C.I. for the unit. Meanwhile, Burgess starts to have doubts about marrying Adam after Adam stays at work instead of meeting Burgess' mother. Also, Platt experiences stress from planning her upcoming wedding.

"Hit Me"

Gregory Yates, the man who murdered Lindsay's friend Nadia, has escaped from a New York state prison and fled to Chicago to continue his killing spree. Voight does everything he can to keep Lindsay from getting too close to the case. Olivia Benson (guest star Mariska Hargitay) and Fin (guest star Ice-T) from New York's SVU assist with the case.

"A Night Owl"

Burgess is called up to the intelligence unit following her bust of a college professor (guest star Richard Thomas) trying to smuggle ten kilos of heroin to Canada. Platt helps out Roman to become a Field Training Officer, and Mouse sets Halstead up with a security job at a medical marijuana clinic.

"The Cases that Need to Be Solved"

The city of Chicago is shaken when the Intelligence unit investigates the murder of a six-year old African American boy. After another shooting in gang territory, Mouse, Lindsay and Halstead search for evidence of a connection between the two shootings.

 "Forty-Caliber Bread Crumb"

Halstead's part-time security job is ambushed by masked gunmen shooting at them while on a bank run. The intelligence unit launches a full-scale investigation into the firm.

"Kasual with a K"

The team investigate the kidnapping of women at a secret shelter. Meanwhile, Burgess and Roman go undercover to retrieve stolen items from a man at a motel.

"If We Were Normal"

The team investigates a real estate agent who kidnaps women and rapes them. Meanwhile, Roman fills in for Platt as acting desk Sergeant as she continues to plan her wedding.

"In a Duffel Bag"

The Intelligence members are horrified to discover an abandoned newborn left out in the freezing weather, and are determined to bring those responsible to justice. Meanwhile, Voight is surprised to discover that his son is in town, Platt returns following her wedding and Burgess and Roman's romantic relationship continues to develop.

"Justice"

After a hooded man opens fire on their patrol car while they're sharing a clandestine, intimate moment, Roman is left wounded and Burgess takes off after the shooter and shoots when she finds him turning in her direction with a glimmer of silver in his hand. No gun has been found at the crime scene and the shooter is identified as a 17-year-old African American teenager. Assistant State Attorney Peter Stone, who sent Voight to prison, and his team need to collect enough evidence to indict the teen and clear Burgess, but must tread with caution on this high profile case as tensions run high, and Roman and Burgess's illicit affair is revealed.

"She's Got Us"

While responding to a call of shots fired at a family residence, Lindsay and Halstead discover the only survivor is the youngest daughter who is traumatized. While Lindsay and Dr. Charles evaluate the girl and see if she can help identify the killer, Antonio and Olinsky look into a pyramid scheme "self-help" group for potential suspects. Meanwhile, Platt tries to make a case to Commander Crowley for Burgess and Roman to remain partners despite their ongoing sexual relationship.

"Start Digging"

The Intelligence unit investigates the murder of a widowed mother. During the investigation it is discovered that she has been in contact with Voight's son Justin. Meanwhile, being taken off the beat following his accident, Roman decides to quit the force and move to San Diego and wants Burgess to go with him. Voight is offered a meritorious promotion to Lieutenant, but a vicious assault on someone close to him results in him risking his career to take justice into his own hands.