Kwon Tae-won

as Bae Myung-ho (1 episode)

as Head

as Kim Woo-Joo's Grandfather (1 episode)

as Baek In Soo (12 episodes)

as Tae Jong-gu (20 episodes)

as Pharmacist

as Yoon-young's Father's Junior

as Director Go

as Chairman

as High ranking public officer

as Self (1 episode)

as Sponsor Chairman

as Hogu

as Chung Suk [former king of Goryeo / Wang Yoo's father] (51 episodes)

as Detective Squad Chief

as Mob Director Park

as Jang

as Racketeer

as Director Ho

as Co. Pres. Kwon

as King

as Police Commissioner

as Jo Il-moon