Guest Stars Yoo Dong Geun as Kwon Yong Gwan Jung Ho Bin as Kang Chul Hwan Oh Yoon Ah as Oh Sook Kyung Do Ye Sung as Jung Kyung Won Sean Richard as Andy Lee Ji Hyun as NTS Staff Oh Chang Suk as Lee Dong Hun Kim Yoon Sung as Min Goo Yoo Ha Jin as NTS Staff Cha Do Jin as Oh Dae Shik Ahn Jin Kyung as Athena Operative Arnold Hong as Suk Joon Lee Han Sol as Young Min Max Changmin as Choi Tae Hyun