Lee Pil-mo

as Oh Jang-su (54 episodes)

as Kang Jin-soo

as Jang Se-heon (16 episodes)

as Ye Jong (20 episodes)

as Kwon Oh-seong

as Lee Hyun [Director] (5 episodes)

as Chairman Choi

as Self (2 episodes)

as Oh Min-Gyu (122 episodes)

as Self (1 episode)

as Yoo Hyun-Ki (51 episodes)

as 沈佑璨 (101 episodes)

as Kim Joon-seok (16 episodes)

as Jang Soon-chul (26 episodes)

as Hwang Gyo-dong (20 episodes)

as Gook Cheon-soo (21 episodes)

as Self (1 episode)

as Cha Soo-Hyuk (64 episodes)

as Duplicator

as Seok Tal-hae (32 episodes)

as Yoon Sang-woo (16 episodes)