A priest and parishioners block law enforcement from entering a church where two murder suspects are suspected of hiding Rixton is caught in a lie with Voight.
The investigation into the murder of a sex offender leads to a private police force operating independently of the Chicago PD Halstead checks Jimmy's DNA to find out if he really is Lindsay's father.
Evidence from the case of a young woman who was shot to death confirms the Chicago P.D. has a serial killer on its hands Voight welcomes Kenny Rixton to the team when Ruzek takes another assignment.
Severide is brought in for questioning after it is discovered that his car has been involved in a deadly crash Lindsay considers meeting her estranged father.
A highly trained killer is believed to be targeting the police department Lindsay speaks to Antonio about his job with the state's attorney.
Bull and J.P. Nunnelly clash over their client, a computer cloud company that is battling the FBI to retain privacy over its client files, on the first of three cases to repay her for defending his brother, Benny at trial.
Sue and her unit are assigned to protect a visiting dignitary targeted for assassination by terrorists.
Sue's first assignment involves an anonymous bomb threat at a local oil company Lucy wants Sue to become her roommate.
A deaf woman's ability to read lips gets her a job on the FBI surveillance team.
The team tries to verify the identity of Joe Smith, who claims he served on the U.S.S. Arizona during the attack on Pearl Harbor and wants to be buried there upon his death.
Gibbs and the team assist Ziva with "the one thing" she said she would need to take care of before returning to see her family.
The team's holiday plans are put on hold when a murder investigation leads to the discovery of a newborn baby who has no identification and no apparent ties to a family.
When Kasie and Jimmy are held hostage in a diner after a jewelry store robbery goes awry, they attempt to keep the other customers safe from the thieves.
The body of a well-regarded Navy technician is found floating in a lake, which isn't far from where a popular community event takes place Sloane's daughter makes an unexpected request.
A Navy officer is murdered the same way his parents were murdered a decade ago the team stumbles across a storage container filled with dollhouses that display re-creations of murder scenes the team members agree to clean out their living spaces.
The team tries to piece together how a retired Navy officer obtained a rare and valuable coin.
The lead suspect in a murder investigation is a woman that Gibbs' friend met on a dating site Sloane has a secret admirer on Valentine's Day.
After Torres and Bishop are victims of a hit-and-run, Torres fights for his life in the Intensive Care Unit.
After a body is found at an unmanned aerial vehicle testing site, the NCIS team must determine if the death was murder or an accident Palmer carefully interviews medical examiner assistant candidates.
The team works with Special Agent Aubrey to investigate a far-reaching conspiracy in the government DNA found on a previous victim linked to the scandal helps the narrow down the suspect pool.