Guest Stars Seo Yi Ra as Sgt. Oh Soo Hyun Yoon Sa Bong as Unit Chief Jeong Yeon Joo Lee Kang Wook as Jung Yoon Ho 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 Lee Sang Jun as Kim Woo Sung
