Detective Hailey Upton is no longer helping the Intelligence Unit solve cases on Chicago PD, but her portrayer, Tracy Spiridakos, is seemingly continuing the character’s legacy in her next project. Spiridakos joined the cast of Chicago PD near the end of its fourth season to replace Sophia Bush’s Detective Erin Lindsay. Upton went on to become a fan-favorite character over the course of Spiridakos’ eight seasons and 140 episodes on the NBC police procedural TV series. Sadly, though, the actress exited Chicago PD following the season 11 finale in May 2024.
https://screenrant.com/tracy-spiridakos-after-story-chicago-pd-intelligence-case-similar-explainer/