Seo Dong-won

as Bae Kook-seong

as Detective Jung

as General Manager No (Eps 2, 6) (2 episodes)

as Lee Gi-seok (13 episodes)

as Detective Seo

as Cha Young-Min (16 episodes)

as Detective Seo

as General Dung

as Marco (2 episodes)

as Doctor Kim (6 episodes)

as Jung Joong-Hee (32 episodes)

as Woo-jin's Employee (6 episodes)

as Jo Jin-bae (32 episodes)

as Kim Jung-bon (16 episodes)

as So Jeong Ha (2 episodes)

as Aquarium Manager (20 episodes)

as Yi Bang-gwa (50 episodes)

as Park Sang Deuk (20 episodes)

as Song Ha-Jin (2 episodes)

as Jeom Baek-i

as Hotel Receptionist

as Jeong-cheol

as Park Young-bae (1 episode)

as Self (1 episode)