Spoiler alert: The following article contains spoilers from the 2025One Chicagocrossover, “In the Trenches.“The 2025One Chicagocrossover sets up 2 possible cameos in the Adam Ruzek and Kim Burgess' upcoming wedding. TheOne Chicagocrossoverconsisted of a three-hour special featuringChicago Med,Chicago P.D., andChicago Fireas the teams worked together following a deadly gas explosion. The crossover event is the first for the franchise since 2019, as the pandemic prevented any close collaborations between the series. However, the long delay was well worth the wait as the special was so much better than expected.

Immediately after the explosion, Firehouse 51 gets to work, arriving on the scene, putting out the fires, and helping victims get medical attention. With Chief Pascal on high alert, he quickly contacts Voight atChicago P.D. for help in transporting the victims toChicago Med.As the special goes on, more information comes out about the explosion, leading to betrayals and several life-or-death situationsin some of thebestOne Chicagoepisodesyet.

Miranda Rae Mayo as Stella Kidd in Chicago Fire, Darren Barnet as John Frost in Chicago Med, and Marina Squerciati as Kim Burgess in Chicago PD.

Ruzek & Kidd Work Together For The First Time In 2025 One Chicago Crossover

The Duo Makes A Great Pair

Among the duos that formed in the2025One Chicagocrossoverare Stella Kidd and Adam Ruzek, who partner up after becoming trapped in an underground train.Kidd and her team were sent to evacuate the train’s passengers while Ruzek was following a leadas part of his role with theChicago P.D. The unfortunate circumstances leads to the two of them becoming trapped along with everyone else when the tunnel’s ceiling collapsed, as a result of the gas explosion.

With Ruzek’s police training, and Kidd’s minor medical knowledge thanks to her training with Firehouse 51, the two of them manage to keep everyone calm despite the growing dangers. With parts of the ceiling already collapsed, the surrounding foundation becomes incredibly unstable. In addition, the train’s passengers are slowly losing oxygen, forcing Kidd and Ruzek to try everything in their power to keep the passengers safe and calm, all while trying to figure out who the suspect is.

Kelly Severide from Chicago Fire and Dr. Mitch Ripley from Chicago Med

The highly anticipated 2025 One Chicago crossover featured a pairing between two veteran characters who’ve never worked together before.

Kidd and Ruzek’s collaboration is brilliant given that this is their first time together. Their partnership comes around slowly asRuzek is hesitant to reveal his informationabout the suspect to Kidd at first. With so much tension in the air and the fear that the train’s passengers might not make it out alive, Kidd and Ruzek are still able to conquer their difficulties and work together in the highly stressful environment.

One Chicago Franchise Poster

Severide & Kidd Need To Attend Ruzek & Burgess' Chicago PD Wedding

The Romantic Occasion Should Feature Other One Chicago Couples

Given how well Kidd and Ruzek worked together in the crossover, and how important Severide’s work has been to theChicago P.D.in the crossover, it would be great to see Kidd and Ruzek attend Burgess and Ruzek’s wedding. TheOne Chicago showshave demonstrated how each unit inChicago FireandChicago P.D.is a family. An invitation should be extended to several Firehouse 51 members as well.

TheOne Chicagocrossover began withChicago Fire’s “In The Trenches: Part 1,” followed byChicago Med’s In The Trenches: Part II,” and finally ended withChicago P.D.’s “In The Trenches: Part III.”

Burgess and Ruzek should specifically invite Kidd and Severide, especially after the 2025 One Chicago crossover. Specific details about the said affair remain under wrap, although it’s likely going to happen in the Chicago PD season 12 finale. Their wedding will likely be a large friends-and-family event. A cameo from Kidd and Severide can make the moment extra special while also being a reminder of this year’s crossover.

How Severide & Kidd’s Cameo In Chicago PD Benefits One Chicago

Crossovers Are Exciting Events

Severide and Kidd’s cameos in “In the Trenches: Part III” were a welcome surprise in the latestOne Chicagocrossover.Both Severide and Kidd are major characters inChicago Fire, but it was nice to see them in action inChicago P.D.’s share of the crossover event. It not only highlighted their skills as first responders but also showcased how vital they are toOne Chicago’s storytelling. Their appearances inChicago P.D.’s episode also helped show just how close all theOne Chicagoshows are and how well the characters work together.

Why 2025’s One Chicago Crossover Starts With Fire Instead of Med

NBC has a very important reason for changing the schedule and starting the One Chicago crossover with Chicago Fire instead of Chicago Med.

Having Severide and Kidd appear inChicago P.D.also helps to continue the precedent of having small cameos outside of characters' respectiveOne Chicagoshows. Crossovers raise excitement for franchises and encourage detailed storytelling as characters from different career paths interact with each other and realize they share more similarities than expected. That being said, NBC and Wolf Entertainment don’t have to wait years to stage any kind of interaction among the franchise’s characters. The 2025One Chicagocrossover event was huge, but smaller crossovers are also exciting.