Ruzek reunites with an old colleague to take down a crime ring but when things don’t add up, Voight and Burgess do some investigating of their own.

Air Date: Wednesday, Oct. 27 (10:00PM – 11:00PM) on NBC.

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CHICAGO P.D. -- "End of Watch" Episode 906 -- Pictured: (l-r) Marina Squerciati as Kim Burgess, Patrick John Flueger as Adam Ruzek -- (Photo by: Lori Allen/NBC)