Halstead and Atwater go undercover to prevent military-grade weapons from hitting the street. Meanwhile, Voight calls in a favor as a last-ditch effort to clear Olinsky's name for Bingham's murder.
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great episode but ruined by inconsiderate people putting spoilers on here. Just think please in future !!
I can't believe Al is really gone...horrible.
Whoa. What an ending.
Nooooooooooooooooooooooo