Bae Yong-geun

as Herbal Shop Merchant

as [Detective] (1 episode)

as Homeroom Teacher

as Sato

as Detective 5

as Record Label Representative

as Detective Team Leader

as Public Prosecutor

as Police Officer

as Yong-pyo

as Uncertain

as Assistant Yang

as Tik Taek-to

as Wolf

as Investigator

as Himself

as Cryptologist

as Bartender

as Beauty Salon Boss

as Seung-ji's Residence Nobleman

as Chef

as Driver