DISTRACTIONS FROM THE PAST

As Atwater finds himself distracted by a past case, a CI from his past resurfaces with a tip on a string of violent armed robberies.

Air Date: Wednesday, May 8 (10-11 p.m. ET) on NBC.

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CHICAGO P.D. -- "Water Line" Episode 11011 -- Pictured: Petey McGee as Butchie -- (Photo by: Lori Allen/NBC)