Guest Stars Kim Jung Woo as Detective Park Jung Pyo as Hong Eun Pyo Lee Dong Yong as Captain Go Dong Eob as Crime Scene Investigator Hwang Bae Jin as Detective Won Mi Won as Min Hey Jin's mother Choi Hyeong Ju as Park Eun Yeol Kim Si Ha as Park Ha Yul Song Ji Hyun as Arrowhead Teenager #2 Kim Kyu Baek as Joo Myung Hoon Yoon Don Sun as Writer Kim Kwang Jin Phillip Kim as Arrowhead Teenager #1 Park Ji Yun as Kyung Hun's Wife Lee So E as Cafe's Customer
