Han Sang-jin

as Ju Hyeong-suk

as Self - Guest

as Team Leader Shin

as Monk Jukryong

as Han Min-hyeok

as Ryu Seung-yeon

as Self

as Sim Jong-soo

as Wi Byung-Joo

as Manager Kim

as Hong Guk-yeong

as Youngest Detective

as Jang Myung-Hwan

as Kang Yoon-Ki

as Song Shi Kyung

as Bang Yong-Min

as King Hyeonjong

as Kim Jin-ho (eps 9)

as Hong Joon-man

as Do Sang-ho

as Park Geon-ha

as Kang Nam-Gu

as Sin Hyeon U [Before]

as Song Sun-Pung

as Ha Suk-jin

as Choi Ki Tae

as Je-moon

as Rival Gang Boss

as Yoon

as math teacher

as Hang Kyung-hoon

as Self - Host