Inspector Koo (Korean: 구경이; RR: Gu Gyeong-i) is a 2021 South Korean television series starring Lee Young-ae in the title role, alongside Kim Hye-jun, Kim Hae-sook, Kwak Sun-young, Baek Sung-chul and Cho Hyun-chul. The series is about the battle of a former police officer against a female college student who is a serial killer. It aired on JTBC from October 30 to December 12, 2021, every Saturday and Sunday at 22:30 (KST). It is also available for streaming on Netflix in selected regions.