For One Chicago fans, few events are more thrilling than the epic crossover episodes that bring together the casts of Chicago Fire, Chicago P.D., Chicago Med, and occasionally Law & Order: SVU. These crossover specials weave together dramatic storylines, high-stakes rescues, and intense criminal investigations, making them must-watch television.
Since the first Chicago P.D. backdoor pilot aired in Chicago Fire in 2014, these crossover episodes have only grown in scope. From bioterror threats and serial killer hunts to devastating fires and hostage situations, these events keep fans on the edge of their seats. Now, with the next three-hour crossover premiering on January 29, 2025, it’s the perfect time to catch up on every major crossover in order.
Wolf Entertainment executive vice president Anastasia Puglisi described these ambitious events as “essentially a three-hour action movie” that requires meticulous coordination across all three series. And with the best talent in every department, One Chicago’s next crossover promises to be its most intense yet.
One Chicago Crossover Episodes in Order
To help you prepare for the upcoming crossover, here’s a chronological guide to every Chicago Fire, P.D., and Med crossover episode so far:
The Beginning: Introducing P.D. and Med
- Chicago Fire (S1, E23) – “Let Her Go” (2013)
- This episode serves as a backdoor pilot for Chicago P.D., as Lt. Casey and Sgt. Voight work together on a case while Firehouse 51 celebrates the opening of Molly’s Bar.
- Chicago Fire (S3, E19) – “I Am the Apocalypse” (2015)
- The backdoor pilot for Chicago Med introduces Gaffney Chicago Medical Center, as the hospital is thrown into chaos when an armed patient claims he carries a deadly airborne disease.
Early Crossovers: Fire, P.D., and SVU Team Up
- Chicago Fire (S2, E20) & Chicago P.D. (S1, E12) – “A Dark Day” / “8:30 PM” (2014)
- A massive explosion forces Firehouse 51 and the Intelligence Unit to work together to rescue civilians and find the bombers before more detonate.
- Law & Order: SVU (S16, E7) & Chicago P.D. (S2, E7) – “Chicago Crossover” / “They’ll Have to Go Through Me” (2014)
- Voight’s team works with New York’s SVU detectives to track down the origins of a child pornography ring.
The Rise of Full One Chicago Crossovers
- Chicago Fire (S4, E10), Chicago Med (S1, E5), Chicago P.D. (S3, E10) – “The Beating Heart” / “Malignant” / “Now I’m God” (2016)
- A firehouse member is critically injured, leading to a dramatic medical emergency and a criminal investigation tied to a corrupt doctor.
- Chicago Fire (S8, E4), Chicago Med (S5, E4), Chicago P.D. (S7, E4) – “Infection” Parts 1-3 (2019)
- A bioterrorism attack forces Firehouse 51, Med, and the Intelligence Unit to collaborate with the CDC to contain the outbreak.
Recent Crossovers & What’s Next
- Chicago Fire (S13, E11), Chicago Med (S10, E11), Chicago P.D. (S12, E11) – “In the Trenches” Parts 1-3 (2025)
- The upcoming three-hour crossover follows Chicago’s first responders as they race to rescue victims trapped underground after a gas explosion.
How to Watch the Next One Chicago Crossover
The highly anticipated crossover event airs Wednesday, January 29, 2025, at 8/7c on NBC, kicking off with Chicago Fire, followed by Chicago Med, and concluding with Chicago P.D..
Fans can also participate in special One Chicago events:
- Xfinity Rewards Sweepstakes (January 23 – February 22) – A chance to win autographed memorabilia and One Chicago merch.
- One Chicago Bingo (January 29 – February 4) – Watch the episodes and play along on NBC.com.
- Instagram Live (January 29 at 7:30 p.m. ET) – Join the One Chicago cast for behind-the-scenes fun and Q&A sessions.
With so many iconic crossovers to revisit, now is the perfect time to relive One Chicago’s most unforgettable moments before the next explosive event!
