Chicago P.D. : Season 3

Intelligence is in pursuit of Derek Keyes, number one on Chicago's Most Wanted list and heroin kingpin. Meanwhile, Halstead tries to get through to Lindsay as her downward spiral continues after her three-week absence from the unit. At District, Olinsky opens up to Platt about a secret from his past. Roman expresses his concerns to Burgess about what she's getting into by marrying Ruzek.

While pursuing a gangbanger, Burgess and Roman come across the body of an eight-year-old boy who was reported missing. Intelligence launches an investigation to find the killer and Antonio and Lindsay question a prime suspect. Meanwhile, Burgess confides in Ruzek about Roman's suspicious behavior and Bunny heads to the Ivory Tower with a statement that could be detrimental to Voight's career.

While Platt tries to manage a chaotic desk area, a man struggling to get her attention takes a drastic action and demands that the unit find his missing daughter. At the same time, Commander Fischer informs Voight that Bunny is bringing up new accusations on a case from his past. Lindsay urges her mother to fix the situation. Meanwhile, Antonio is shocked to learn a secret Olinksy has been keeping.

The team discovers the mutilated body of a government official while responding to an informant's tip about an upcoming drug trade. Meanwhile, Burgess helps plan a surprise for Platt.

Lindsay goes undercover in an effort to track down a rogue police officer targeting women leaving a local casino. When Detective Martin Watts, who oversees all cases out of the casino, gets word of the investigation he becomes involved much to Voight's dismay. After recent events, Burgess sets plans in motion to transfer Districts pending Platt's approval, and Mouse attempts to lift Ruzek's spirits by offering to set him up with a friend. Meanwhile, Antonio volunteers to take Roman's place in th

SVU joins Chicago P.D. in a manhunt for two notorious escaped serial killers. (Part 2 of a 2-part Law & Order: Special Victims Unit - Chicago P.D. crossover on 2-10.)

While working at a sobriety checkpoint, Burgess finds a duffel bag full of heroin in the truck of a respected college professor who claims to know nothing about how the drugs ended up there. At District, Roman expresses his desires to become a Field Training Office to Platt, and Mouse sets Halstead up with an off-duty security job working for the attractive owner of a medical marijuana clinic.

When a young boy is executed, Intelligence turn to the boy's parents for information and upon further investigation, discover the father has a criminal background and was a part of a local gang.

While out on a bank run for his off-duty security job at the dispensary, Halstead and his co-workers find themselves under attack by a violent robbery crew. Meanwhile Roman, Burgess, Antonio, Halstead, Ruzek and Atwater follow-up on a lead and track down a potential suspect.

While responding to a call of shots fired, Voight, Antonio, Halstead and the team come across a secret battered woman's shelter and discover the owner has been wounded and a resident of the shelter has been kidnapped. Burgess and Roman go undercover to track down a man robbing people by catfishing them on a dating app. Lindsay opens up to Halstead about her past.

The team searches for a suspect who held a woman for months and, while physically abusing her, attempted to psychologically manipulate her into forgetting her identity. In other events, Ruzek accuses Roman of having feelings for Burgess.

Responding to a call about a suspicious duffle bag at the Chicago Lakefront, Voight is horrified to discover that the bag contains the frigid and unmoving body of a newborn baby. Determined to find the culprit who abandoned the infant, Intelligence receives a promising lead based on information provided by Chicago Med and Ruzek helps zero in on a potential suspect. Meanwhile, Voight is surprised to hear that his son is in town and Burgess and Roman grow closer.

After a hooded man open fires on their patrol car, Roman is left wounded and Burgess takes off after the shooter, briefly losing sight of him, and shoots when she relocates 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 honor student who will likely never walk again due to his injuries. Protests begin as the public views the case as another incidence of a police officer shooting an unarmed

Lindsay and Halstead respond to a shots fired call and discover one survivor: a young girl. Antonio and Olinsky investigate a "self help" group. Platt makes the case to Crowley for why Burgess and Roman should remain partners.

In the Season 3 finale, the team investigates the murder of a single mom who was in contact with Voight's now-reformed son, who was himself brutally assaulted. Meanwhile, Roman makes a major decision and Crowley plans to make changes within the unit.