The Best Episodes Written By Gwen Sigan

Voight and the team muster all their expertise to bring down a deadly crime ring. Burgess finds herself in a dangerous situation.

With the FBI closing in on the Roy Walton investigation, Voight and Halstead strategize on a way out. After a city bus driver is shot by a passenger, the team investigates a possible abduction.

When a P.D. informant is murdered, the team digs in to track down the perpetrator only to learn a shocking truth. Voight and Ruzek strategize to help Burgess.

Tasked with shadowing a crisis prevention team, Upton finds her approach to policing at odds with the team's mental health clinician. Voight stands by Upton as she continues to struggle in her personal life.

Intelligence chases down a lead in the ongoing serial killer investigation as news of the case reaches the public.

When Upton and Ruzek answer an emergency call to an abandoned house, their investigation leads them down a dark path.

Voight and the team delve into a cold case in search of clues to solve a shocking new crime. With its focus on buried memories, the case sparks concern for Burgess and Ruzek about Makayla's mental healing.

Still reeling from the death of informant Anna, Voight faces a new threat as he tries to keep the neighborhood clean. New wrinkles develop in the Upton, Halstead and Voight dynamic. The team gets a new chief.

As Richard Beck's timeline for a deadly attack moves up and Samantha panics, Ruzek and the team scramble to get ahead of unprecedented disaster.

An ongoing case hits close to home for Voight as Intelligence teams up with an SVU detective to track down a prolific offender.

As the monthslong investigation into the serial killer reaches its close, Voight must outsmart the offender in a race against the clock. Upton must make a vital decision.

Halstead's partying with Camila unintentionally puts him in the middle of a drug-related homicide. He's forced to choose between loyalty to his unit and his girl. Meanwhile, Voight finally discovers the mole in his unit.

Upton becomes consumed with a decades-old missing persons case linked to Petrovic after a young child shows up to the district seeking help.

When a young officer is shot dead in the lobby of an apartment building, Intelligence looks to the latest known offenders who have threatened the police. But when a second officer is killed, the team finds that they are dealing with someone who is highly trained and knowledgeable.

While out for a jog, Upton witnesses a horrible car crash and risks her own life to save the passengers. After learning more about the victims, the team must track down the man responsible for the brutal crash.

A young girl is shot and Cosgrove teams with Det. Jalen Shaw to track down her killer. Benson and Stabler assist and realize it's more than a typical homicide. McCoy and Price seek justice against an international crime ring, but complications threaten the case. The crossover continues on Law & Order: Special Victims Unit S24E01 Gimme Shelter (II) and Law & Order S22E01 Gimme Shelter (III).

Ruzek and Burgess discover a child walking alone in the middle of the street, and when they take her home, they discover that her entire family has been murdered. Upton is approached with a job offer from the FBI.

Intelligence investigates a string of bombings targeting members of the media. Racing against a ticking clock, the team enlists Firehouse 51 to help examine the devices and prevent the next attack. The crossover continues on Chicago Fire S06E013 Hiding Not Seeking (II).

The body of a 15-year-old girl is found crushed in an abandoned building after she runs away from a treatment center for troubled girls. Voight sends Halstead undercover as a guard to work from the inside at the center, where he believes the girls are trading sexual favors for something in return.

Upton's dogged pursuit of a missing teenage girl leads the team into a dark web of human trafficking. Chief O'Neal becomes involved with the unit's investigation when it becomes evident his son, Sean, has a connection to the missing girl.

In the wake of several gang-related child abductions, Intelligence must race against time to find a kidnapped boy. Owing to their swiftness and military precision, the team scours the VA records and tracks the suspects to a former Army Ranger. With his previous experience as a Ranger, Halstead convinces Voight to send him undercover to try and get information from inside.

Using information from Chicago Fire's Cruz, Intelligence chases down the robbery crew that’s been using the lockbox key. Voight is under pressure to bring the crew to justice without tarnishing the reputation of a murdered firefighter who might have been involved. The crossover starts on Chicago Fire S07E15 What I Saw (I).

A wellness check on a family reveals signs of foul play and Upton is determined to find the parents and young daughter. As Hailey delves further into the troubled family dynamics, she finds herself reflecting on her own childhood trauma.

After an explosion rocks the case, the team scrambles to finally take down Escano as everyone nears their breaking point.

After a shocking discovery, the team begins closing in on Sean O’Neal with every shred of evidence they can find. Determined to keep his son out of prison, Chief O’Neal hires a lawyer.