Noh Young-hak

as Student

as Hacker

as Hyun-tae

as Cha Min-woo (121 episodes)

as King Gojong

as Petty officer Choi

as Na Soon-nam (16 episodes)

as Kim Hee-taek

as Ha Dae-chul (young) (16 episodes)

as Lee Yeong-joon

as 姜东秀 (50 episodes)

as Jang Dong-soo (young) (26 episodes)

as Im Sung-chan (16 episodes)

as Prince Gwanghae (young) (32 episodes)

as Oh Joon-young (young) (20 episodes)

as Kim Min-ho (20 episodes)

as Lee Jung-geun (teenage) (35 episodes)

as Yushin (young) (70 episodes)

as King Uija (teen) (36 episodes)

as Jo Gyeong-su

as Chun-doong (young) (32 episodes)

as Tae-won's older brother (4 episodes)

as Heo Chan-shik (20 episodes)

as Seokpum (young) (62 episodes)