One Chicago consists of three shows that have each aired for at least a decade, although they have been plagued with cast turnover issues and Chicago Med season 10 recently confirmed several returning cast members. It is the only one of Wolf’s three franchises that doesn’t focus exclusively on police procedurals, as Chicago Med is a medical drama and Chicago Fire focuses on firefighters rather than cops. Although most of Wolf’s other series are set in New York instead of Chicago, all current Dick Wolf shows are set in the same universe, and some shows have featured crossover appearances.
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10Chicago Fire
The Oldest One Chicago Show Led to The Entire Franchise
Chicago Fire
Cast
Taylor KinneyKelly Severide
David EigenbergChristopher Herrmann
Although it is set in Chicago rather than New York, the Chicago Fire crew have been involved in crossover stories with Law & Order: SVU twice. Both of these stories began with fires in Chicago that uncovered evidence of sex crimes in New York, which brought Benson and the rest of her team in to catch the perpetrator. Chicago Fire has also crossed over with its sister shows in the One Chicago franchise on ten separate occasions, although it has not done so since 2019.
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9Chicago PD
Hank Voight Appeared on Chicago Fire First
Chicago P.D.
Cast
Jason BegheHank Voight
Marina SquerciatiKim Burgess
The police and fire departments work together when necessary despite the rough start. Voight also softened somewhat in later seasons, which has helped improve relations between him and Chief Bowden. With Bowden exiting Chicago Fire, there is an open question of how the new chief will navigate the relationship with Voight. Voight still engages in questionable behavior when he feels the circumstances warrant it, so the new chief will have to decide whether it’s worth making an enemy out of him.
8Chicago Med
The Medical Drama Originally Centered on Jay Halstead’s Rebellious Brother
Chicago Med
Cast
Marlyne BarrettMaggie Lockwood
S. Epatha MerkersonSharon Goodwin
Ironically, neither Halstead brother is part of their respective show anymore, with Jay leaving Chicago PD after season 10 and Will leaving Chicago Med after season 8.
The Halstead brothers sometimes worked together, most notably during Chicago Med season 4, when Will was working undercover to help the police catch a mob boss. During this season-long arc, Will provided medical care to the target while secretly funneling information to Jay, but felt bad about it and kept trying to get out of their arrangement. The storyline ended after Will’s wedding to Natalie was derailed by his life being in danger.
7Chicago Justice
After Its Cancellation, The Lead Attorney Headed to New York
Chicago PD‘s Alvin Olinsky appeared in one episode of Chicago Justice.
Dick Wolf often reuses last names in his various works, but the name “Stone” was not a coincidence. After Chicago Justice was canceled, Stone traveled to New York and worked as an ADA on Law & Order: SVU for a season, during which his backstory became prominent. Stone’s late father was Benjamin Stone, who had been the ADA during the first three seasons of the original Law & Order, and Peter always felt like he couldn’t measure up to his well-known father.
6Law & Order: SVU
There Are Several Connections To Chicago PD
Law & Order: Special Victims Unit
Cast
Mariska HargitayOlivia Benson-
Ice-TOdafin ‘Fin’ Tutuola
Benson’s interest in Voight isn’t as surprising as it seems, considering the will-they-won’t-they nature of her relationship with Elliot Stabler. Stabler is also a hothead prone to getting physical with suspects, though he is not as amoral as Voight tends to be. Benson also had a relationship with Chicago Justice’s Peter Stone that ended when he realized his feelings for her could interfere with his objectivity and left his position.
5Law & Order: Organized Crime
The Similar Cases Are Not The Only Connection
Law & Order: Organized Crime
Law & Order: Organized Crime stars former SVU detective Elliot Stabler as the lead detective in the Organized Crime Bureau. This unit is similar to Voight’s Intelligence Unit, as it focuses on mob bosses, gang leaders, and other heads of criminal organizations. However, this series has not yet had any crossovers with Chicago PD, and Stabler was not in New York when Benson worked with, and fell for, Hank Voight.
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4Law & Order
S. Epatha Merkerson is Best Known As Anita Van Buren
Law & Order
Cast
Sam WaterstonJack McCoy-
S. Epatha MerkersonLieutenant Anita Van Buren
The original Law & Order was on a ten-year hiatus when Chicago PD crossed over with Law & Order: SVU. However, it has a strong connection to the One Chicago franchise because of Peter Stone. Additionally, it shares an actress with Chicago Med. S. Epatha Merkerson played Lieutenant Anita Van Buren on Law & Order in the 1990s and now plays Sharon Goodwin on Chicago Med.
Two of the FBI shows also currently have actors from other Dick Wolf shows playing the heads of teams.
3FBI
This Connection Makes Her Exit from Chicago PD Make Sense
FBI
Cast
Missy PeregrymMaggie Bell
Zeeko ZakiOmar Adom OA Zidan
While the FBI franchise is set in New York and deals with federal rather than state crimes, it has the most direct connection to the One Chicago franchise of any non-Chicago show. Hailey Upton once came to New York on loan from PD to help work a case. The FBI team was investigating a case involving a drug deal gone bad, which is the Intelligence Unit’s wheelhouse. Thus, Upton was a logical choice to travel to New York to assist in catching the masterminds behind the crime.
As with Benson/Voight, Upton clashed with the FBI team because they expected her to stick only to legal methods of getting the suspects behind bars. However, this crossover opened the door for future guest appearances, especially now that Chicago PD’s Hailey Upton has left the series ahead of season 12. She decided she wanted a more fulfilling job and was last seen checking out job listings with the FBI and DEA, so she could work with the FBI team in future episodes if the storyline calls for it and the actress is willing to do another guest appearance.
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2FBI: Most Wanted
Dylan McDermott Makes Crossovers Hard, But Not Impossible
FBI: Most Wanted
Cast
Roxy SternbergSheryll Barnes
Keisha Castle-HughesHana Gibson
The FBI franchise is connected to One Chicago via Upton, but FBI: Most Wanted has an interesting and ironic behind-the-scenes connection: Dylan McDermott. McDermott played supervillain Richard Wheatley during the first two seasons of Law & Order: Organized Crime. However, after Julian McMahon’s exit from FBI: Most Wanted, McDermott moved over to that show to play the new head of FBI: Most Wanted‘s Fugitive Task Force, Remy Scott. Wheatley is presumed dead after a car explosion, but nobody was ever found, thus potentially making him the type of dangerous fugitive that Scott’s team brings to justice.
It’s unlikely that there would be a crossover appearance involving the capture of Richard Wheatley because McDermott would have to play a dual role. However, the two series are set in the same universe, so if Wheatley is still alive, Scott has an evil doppelgänger somewhere. Even if Wheatley were not involved, it would be natural for this series to crossover with Law & Order: Organized Crime since they are set in the same universe and investigate similar types of crimes.
1FBI: International
Jesse Lee Soffer Won’t Be Playing The Same Character, But The Connection Still Remains
FBI: International
Cast
Carter RedwoodAndre Raines-
Vinessa VidottoCameron Vo
FBI: International is different from the other FBI shows because it is set in Europe and involves international crimes that affect Americans. So far, there have been no direct connections between this series and the One Chicago shows. However, as of 2024, it is the third Dick Wolf series to use one actor for two different roles in the same universe, as former Chicago PD star Jesse Lee Soffer is joining FBI: International‘s season 4 cast.
Chicago Med alum Colin Donnell guest starred on the final two episodes of FBI: International and was widely speculated to be the new lead before Soffer was announced.
