Guest Stars Yoon Joo Sang as Oh Hyun Kyu Yoon Je Moon as Park Sang Hyun Na Yoon as Hwang Tae Sung David McInnis as Ray Kim Hye Jin as Yang Jung In Jung Han Yong as Jung Hyung Joon Hyun Jyu Ni as Yang Mi Jung Myung Ji Yun as Hong Soo Jin Park Soo Hyun as Park Joong Kwon Park Yong Gi as Yoo Kang Oh Jung Jong Joon as Kwan Oh Hyun Gil Geum Sung as Eo Sung Shik Im Hyung Joon as Jin Sa Woo's Subordinate Ryu Seung Ryong as Head of IRIS mercenaries Lee Jung Yong as Military Training Instructor / IRIS Mercenary Son Jung Min as IRIS Mercenary Jung Ho Bin as Kang Chul Hwan