Choi Jin-ho

as Mun Jeong-hun (12 episodes)

as Shim Seung-bo (12 episodes)

as Kim Chang-yi (123 episodes)

as Jun-cheol

as Han Ki-hwan (16 episodes)

as Son Min Ho (16 episodes)

as Lee Mok-yo

as Director of NIS

as Park Yeong-choon

as Park Jeong-gi, Chief Presidential Secretary

as Lee Se-hun (24 episodes)

as Ahn Min-Shik (16 episodes)

as Do Yun-wan (16 episodes)

as Kim Jeon-moo

as Jang Hyung-sik

as Mr. Min Byeong-uk (16 episodes)

as Baek Jong-Sik (20 episodes)

as Park Seung-gu

as Yi-soo

as Choi Dong-wook (20 episodes)

as Lee Sang-jin

as Combined Forces Command Controller

as Eye

as Prosecutor