Chicago P.D. officially premiered on NBC, launching the series and introducing viewers to the characters and setting of the Chicago Police Department's Intelligence Unit.
The first season concluded, setting the foundation for future storylines and character development in the series.
Brian Geraghty joined the cast, but the character Hank Voight, played by Jason Beghe, remained central to the storyline, solidifying his role as the complex lead character.
The second season began airing, continuing the darker tone and complex narratives involving the Intelligence Unit.
The show introduced new characters and story arcs, expanding the universe and exploring deeper police procedural themes.
Celebrated five years of continuous airing, highlighting the show's sustained popularity and impact.
Initiated several crossover episodes with Chicago Fire and Chicago Med, creating a shared universe and expanding storytelling possibilities.
NBC renewed Chicago P.D. for its tenth season, reflecting ongoing network confidence in the series.
The Intelligence Unit is formed within the Chicago Police Department to target high-profile and organized crime cases in the city.
Detective Jay Halstead transfers to the Intelligence Unit, bringing his expertise as a former Army Ranger and detective.
Hank Voight takes over as sergeant of the Intelligence Unit, leading the team through various challenges.
Detective Hailey Upton joins the Intelligence Unit, becoming an integral part of the team with her sharp investigative skills.
Officer Adam Ruzek is promoted and joins the Intelligence Unit, showcasing his street smarts and commitment.
Detective Erin Lindsay leaves the Intelligence Unit to pursue other opportunities, marking a significant change in the team dynamics.
The Intelligence Unit investigates a high-stakes corruption case involving the Chicago Mayor's office, testing the team's loyalty and ethics.
Sergeant Voight undergoes an Internal Affairs investigation focused on his aggressive methods and past.
Officer Adam Ruzek survives a near-fatal shooting while on duty, affecting both him and the team emotionally.
The Intelligence Unit successfully apprehends a serial killer terrorizing Chicago neighborhoods.
