When Upton and Ruzek answer an emergency call to an abandoned house, their investigation leads them down a dark path.
Air Date: Wednesday, Oct. 13 (10:00PM – 11:00PM) on NBC.
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CHICAGO P.D. -- "In The Dark" Episode 904 -- Pictured: (l-r) Jesse Lee Soffer as Jay Halstead, Jason Beghe as Hank Voight, Tracy Spiridakos as Hailey -- (Photo by: Lori Allen/NBC)
