Bae Yong-geun

as Herbal Shop Merchant

as Sato

as Homeroom Teacher

as Detective

as Detective Team Leader

as Public Prosecutor

as Record Label Representative

as Police Officer

as Yong-pyo

as Uncertain

as Assistant Yang

as Tik Taek-to

as Investigator

as Wolf

as Cryptologist

as Himself

as Bartender

as Beauty Salon Boss

as Seung-ji's Residence Nobleman

as Chef

as Driver

as [Detective]