Fans of the One Chicago universe are in for a thrilling surprise this spring as two beloved former Intelligence Unit members are officially set to make their long-awaited comeback.
It has now been confirmed that Chicago P.D. alums Tracy Spiridakos and Jesse Lee Soffer will reprise their iconic roles as Hailey Upton and Jay Halstead for an upcoming three-part crossover event uniting Chicago Fire, Chicago Med, and Chicago P.D. once again.
The special television event is scheduled to air on March 4, 2026, running from 8 p.m. to 11 p.m. ET on NBC, marking one of the biggest franchise crossovers in recent years.
According to early plot details, the night kicks off when Firehouse 51 responds to a terrifying emergency at an airfield after a passenger aircraft mysteriously goes silent mid-flight. What initially appears to be an isolated aviation crisis quickly spirals into a far more dangerous and complex investigation — one that could threaten countless lives across Chicago.
As the case expands beyond the capabilities of a single department, familiar faces return to assist in cracking the mystery.
Hailey Upton will reportedly come back to Chicago not as a detective, but as an FBI Special Agent working on a federal drug enforcement task force tied to Detroit. Her investigation ultimately reconnects her with her former P.D. colleagues, drawing her back into the Intelligence Unit’s orbit.
Meanwhile, Jay Halstead is said to be operating in a separate undercover capacity, with both characters becoming crucial to unraveling the high-stakes case at the center of the crossover storyline.
The return of Spiridakos and Soffer is especially meaningful for longtime viewers, as both actors previously exited the series in Seasons 11 and 10 respectively — leaving unfinished emotional and professional storylines behind.
Now, with their reunion confirmed for the franchise’s first major crossover of 2026, many fans are hopeful that this appearance could finally deliver long-awaited closure for the former partners — both in the field and beyond.
Whether this marks a temporary comeback or something more permanent remains to be seen, but one thing is certain: the Intelligence Unit is about to feel complete again — if only for one unforgettable night.