Home Photos Chicago PD Chicago PD 9×04 “In the Dark” Photos CHICAGO P.D. -- "In The Dark" Episode 904 -- Pictured: Tracy Spiridakos as Hailey -- (Photo by: Lori Allen/NBC) PhotosChicago PD Chicago PD 9×04 “In the Dark” Photos By The TVPulse Team - October 7, 2021 Twitter 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. NUP_195128_0113.JPG ◄ Back Next ► Picture 3 of 17 CHICAGO P.D. -- "In The Dark" Episode 904 -- Pictured: Tracy Spiridakos as Hailey -- (Photo by: Lori Allen/NBC) RELATED ARTICLESMORE FROM AUTHOR ‘One Chicago’ Sets 3-Show Storyline, The First in 5 Years Chicago P.D. Photos: Episode 12×08 “Penance” Chicago P.D. Photos: Episode 12×07 “Contrition” Chicago P.D. Photos: Episode 12×06 “Pawns” Chicago P.D. Photos: Episode 12×05 “Water and Honey”