Dự Án Mật: Thảm Hoạ Trên Cầu

Moon Sung Geun

Byeong Hak [Sun Ok's husband]

Ye Soo Jung

Sun Ok [Byung Hak's dementia wife]

Kim Tae Woo

Jung Hyeon Baek [NIS director at Blue House]

Park Hee Bon

Sim Mi Ran [Yu Ra's elder sister]

Park Ju Hyun

Sim Yu Ra [Professional golfer]

Kim Soo An

Cha Gyeong Min [Cha Jung Won's daughter]

Ha Do Gwon

Kang Dae Wi / Captain Kang [Special Forces]

Goo Sung Hwan

[Bus driver]

Moon Byung Joo

BJ

Jang Tae Min

[Administrative officer]

Yoo Yeon

[Administrative officer]