Chicago P.D. season eight, episode seven, "Instinct," follows Detective Adam Ruzek navigating a high-stakes undercover operation involving a volatile informant, Tommy. The episode, which aired on February 17, 2021, centers on a drug investigation that goes wrong, forcing Ruzek into a violent altercation that is filmed by a bystander and labeled as police brutality. For the full recap, visit TV Fanatic . Chicago Pd Season 8 Episode 7 Review: Instinct - IMDb