The One Chicago 2025 crossover wasn’t just action-packed—it was a masterclass in layered storytelling. While the flames and gunfire stole the spotlight, eagle-eyed viewers caught a series of hidden clues that may hint at what’s coming next across Fire, Med, and P.D.
Here are 10 key moments you probably missed:
Voight’s Handshake With Reid – In P.D., Voight reluctantly shakes hands with FBI Agent Reid. That moment? A callback to their Season 10 feud—suggesting temporary alliances could collapse again fast.
The Scorched Dog Tags – In Fire, Severide finds a burned military dog tag at the explosion site. Fans speculate it belonged to a veteran with ties to Season 5’s arsonist storyline.
April Sexton’s Pager – Med’s April Sexton was never seen—but her name flashed briefly on a hospital pager. Could she be returning?
Ruzek and Kidd in the Same Ambulance – They don’t interact much, but sharing that scene could foreshadow a deeper Fire–P.D. bond or even a romantic subplot.
Maggie’s Hidden Diagnosis – A file on Maggie’s desk lists her blood test results with elevated markers—possibly teasing a health scare in Med’s next season.
Casey’s Name on a Building Permit – In Fire, a permit for the damaged building was signed by “M. Casey Construction.” Fans are hoping for Jesse Spencer’s return.
Burgess’s Cryptic Statement – After regaining consciousness in Med, Burgess whispers, “He was there.” But no one saw the suspect. Delusion or cover-up?
The Burned Photograph – A partially scorched photo seen in the wreckage shows Voight and an unknown woman—sparking speculation about a forgotten past.
Nina Chapman’s Transfer Letter – Voight’s desk shows a letter requesting Officer Chapman’s reassignment. Could this be the start of her departure?
The Surveillance Room – At the very end, a hidden room with surveillance monitors shows ALL the characters on screen—hinting someone’s been watching from the shadows.
Whether you caught them or not, these subtle moments are now setting up what promises to be one of the most thrilling seasons of One Chicago yet.
