Upton brings back an old undercover identity to help take down a meth ring spearheaded by a former criminal contact. And with pressure from Woods mounting, Voight calls in a favor for Olinksy in Chicago PD Season 5 Episode 18 "Ghosts" airing next week on NBC.
Watch the promo below!
Looking for more spoilers?
Head over to Chicago PD Episode Guide: "Ghosts" for the full description of this episode.