Kim Hie-won

Director

as Kim Jin-man (10 episodes)

as Huh Yakseon

as Director of Research Institute

Director, Creator

as Doctor Yang

as Sun-woo

as Park Young-jin

as Lee Chun-seok (6 episodes)

as Won Jong-muk (16 episodes)

as Choi Il-hwan (21 episodes)

as Self (2 episodes)

as Woo Ji-man

as Self (1 episode)

as Soon-mo

as Choi Kwang-gook (1 episode)

as Lee Gyu-ho

as Department Head Kim

as Jong-bae

as Patrick

as Self (54 episodes)

as Teacher Ttong

as Master Park

as Romanticist