Still reeling from the death of his informant Anna, Voight faces a new threat as he tries to keep the neighborhood clean.

New wrinkles develop in the Upton, Halstead and Voight dynamic.

The team gets a new chief.

Air Date: Wednesday, Sept. 21 (10:00PM – 11:00PM) on NBC.

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CHICAGO P.D. -- "Let it Bleed" Episode 1001 -- Pictured: Patrick John Flueger as Adam Ruzek-- (Photo by: Lori Allen/NBC)