Ahn Kil-kang

as Paul Oh (6 episodes)

as Koo Bong-san (7 episodes)

as Park Kang-seong (12 episodes)

as Lee Yong-han (4 episodes)

as Self (1 episode)

as Hyun Ui-Ong, as Hyun Ui-ong (12 episodes)

as Doctor

as 김호철 (2 episodes)

as Jin Baek-won (16 episodes)

as Jang-hyeok's Father

as Do Hak-sung (16 episodes)

as Min Moo-goo (2 episodes)

as Hyun Ui-ong (16 episodes)

as Goo Young-tae (32 episodes)

as Yang Chi-soo (100 episodes)

as Han Soo Ji's Father

as Mr.Kim

as Hae-Seung (48 episodes)

as Teacher Goo (16 episodes)

as Woo-yeon's Father

as An Tae-Bok (40 episodes)

as Jang Pan-Soo (50 episodes)

as Detective Bae (16 episodes)

as head of arts team (2 episodes)

as Kim Chang-gul (16 episodes)