Guest Stars Seo Yi Ra as Sgt. Oh Soo Hyun Yoon Sa Bong as Unit Chief Jeong Yeon Joo Yoon Na Moo as Park Joon Seo Kim Min Ju as Oh Yoon Jin (High School) Park Jung Pyo as Insp. Yoo Kyung Hwan Park Keun Rok as Jeong Sang Eui Seo Sang Won as Police Chief Bae Byung Ho Jang Hyuk Jin as Hwang Hong Suk Lee Yeon Joo as Kim Seo Jin
