Lee Sun Kyun as Cha Jeong Won
Ju Ji Hoon as Joe Park
Kim Hee Won as Dr. Yang

Supporting Cast

Moon Sung Geun as Byeong Hak [Sun Ok’s husband]
Ye Soo Jung as Sun Ok [Byung Hak’s dementia wife]
Kim Tae Woo as Jung Hyeon Baek [NIS director at Blue House]
Park Hee Bon as Sim Mi Ran [Yu Ra’s elder sister]
Park Ju Hyun as Sim Yu Ra [Professional golfer]
Kim Soo An as Cha Gyeong Min [Cha Jung Won’s daughter]
Ha Do Gwon as Kang Dae Wi / Captain Kang [Special Forces]
Goo Sung Hwan as [Bus driver]
Moon Byung Joo as BJ
Jang Tae Min as [Administrative officer]
Yoo Yeon as [Administrative officer]