TheOne Chicagouniverse established a great duo during the 2025 crossover, andChicago Firecontinues their story in season 13, episode 19, “Permanent Damage.” Over the years,theOne ChicagoTV showshave brought together numerous characters who rarely interact. Most recently,the 2025 crossover, “In the Trenches,” featured many unsuspecting but great pairingswho all worked together to save victims (including two of their own) trapped underground in a subway tunnel thanks to a gas explosion.

New episodes ofChicago Fireseason 13 air on Thursdays at 9 pm ET on NBC. The finales of allOne Chicagoshows will premiere on August 07, 2025 (perTVLine).

Severide in Chicago Fire season 13, episode 18 (1)

Stella Kidd fromChicago Fireand Adam Ruzek fromChicago PDwere the two characters trapped underground duringthe 2025One Chicagocrossover. They certainly had the upper hand because they shared so many scenes together, butKidd and Ruzek were undoubtedly the three-part event’s best duo.As a result, it’s exciting to see them (sort of) connect again inChicago Fireseason 13, episode 19.

Severide Calls Ruzek For Police Help In Chicago Fire Season 13, Episode 19

Severide Investigates An Old Fire

Even thoughKidd doesn’t appear inChicago Fireseason 13, episode 19, the hour still acknowledges her previously established connection to Ruzek via her proxy to Severide. In “Permanent Damage,” a young teenager named Natalie approaches Severide at Firehouse 51 looking for Kidd. Since she is at a training course in Maryland, Natalie turns to Taylor Kinney’s character for help. Natalie’s family lost their home to a fire many years ago, but she is just now coming forward to share her belief that her sister started it. So,Severide starts investigating, and the first thing he does is call Ruzek.

Michael Bradway

Jack Damon

Unfortunately, Patrick John Flueger doesn’t make a cameoinChicago Fireseason 13, episode 19. The audience only sees and hears Severide’s side of the call, which featuresthe firefighter asking the police officer to run a license plate for him.He catches the plate when Natalie and her sister drive away in her car.

2025 One Chicago Crossover Established A Relationship Between Ruzek & Kidd

Ruzek & Kidd Were Stuck Underground Together

Chicago Firemakes it clear that Severide trusts Ruzek, which is undoubtedly a result of Ruzek’s new bond with Kidd after the 2025One Chicagocrossover. Following their shared traumatic experience, Ruzek and Kidd have probably kept in touch. Since Severide is married to Kidd, he and Severide have likely formed a friendship, as well. So,Ruzek’s new dynamic with Kidd effectively extends to Severide,as seen inChicago Fireseason 13, episode 19.

Chicago Fire Movie Poster