Jo Min-ki

as Wang Geon / King Taejo (20 episodes)

as Jeong Byung-kwon (12 episodes)

as Kyung-ho

as Kang Byeong-chul

as Soo-yeong

as Seo Jin-ki (41 episodes)

as Moon Il-seok (16 episodes)

as Section Chief

as Park Tae-hwa (15 episodes)

as Yun Sang-woo (1 episode)

as Shin Tae-hwan (56 episodes)

as Dr. Han Ji-woo

as 박태준 (1 episode)

as Section chief Jo

as Self (1 episode)

as Jung Yeong-Jun (169 episodes)

as 정영준 (1 episode)

as King Youngjo (15 episodes)

as Han Jung-hwan (19 episodes)

as Jung Ji-suk (48 episodes)

as 吕时宇 (79 episodes)

as Kim Nam-jin (36 episodes)

as 이묵현 (18 episodes)