Season 4

Lindsay deals with the consequences of her actions when her mother is suspected of murder.

Intelligence tracks down a group of vigilantes torturing and killing pedophiles.

Intelligence uncovers a surprising crew of suspects in a series of bank robberies.

Voight uncovers a connection between the murder of a teenage boy and a 17-year-old case.

Burgess’s sister becomes a sexual assault victim after she’s encouraged to spend a night out with friends.

Intelligence investigates one of Chicago’s wealthiest families when „Night Crawler“ Bobby Trent is murdered.

A hiker leads intelligence to a woman being held hostage in the woods outside Chicago.

Intelligence works to find the arsonist behind a warehouse fire that left Olinsky’s daughter fighting …

Intelligence re-opens a case when a grieving father seeks to avenge his daughter’s murder.

When a burnt body is found in a torched house along with an injured boy, Intelligence works to find the cause.

The body of a 15-year-old girl is found crushed in an abandoned building after she runs away …

The investigation of a jogger’s murder in the park is blocked by a church offering sanctuary to the …

When a mutilated sex offender is found dead, it is unclear if he was the victim of a hate crime, …

When the body of a young woman is found, the Chicago police realize there’s a serial killer at large …

Kelly Severide of Firehouse 51 is brought to the District for questioning when his car is found …

A highly trained killer declares war on the Chicago police department.

The only witness in the case against a suspected serial rapist is found murdered.

A teenage girl is found dead in the home of a baseball player who’s a friend of Olinsky’s.

Intelligence tracks down the people who have been dealing a drug that’s been linked to several overdoses throughout Chicago.

Intelligence searches for the fiance of a man found badly beaten in the most dangerous neighborhood …

Intelligence investigates a shooting outside a concert that leads to a tangled web of gang-related violence.

Platt and her father are brutally assaulted.

ntelligence investigates a murder-arson case as Voight and Lindsay continue to deal with the aftermath of Justin’s death.