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The first season of this police procedural drama follows the men and women of the Chicago Police Department, led by Sgt. Hank Voight (Jason Beghe), who was first introduced in Season 1 of sister series "Chicago Fire." Serving with him are: Det. Antonio Dawson (Jon Seda); patrol officer Kevin Atwater (LaRoyce Hawkins); Det. Erin Lindsay (Sophia Bush); Det. Sheldon Jin (Archie Kao); Det. Alvin Olinksy (Elias Koteas); Det. Jay Halstead (Jesse Lee Soffer); and patrol officer Kim Burgess (Marina Squerciati). As the team go after a Colombian drug cartel that's linked to a series of brutal slayings, rookie officer Adam Ruzek (Patrick John Flueger) joins the team fresh from the police academy. The season includes a crossover episode with "Chicago Fire."