탐정: 더 비기닝

Kwon Sang-woo

as Kang Dae-man

Sung Dong-il

as Noh Tae-soo

Lee Seung-joon

as Kim Yong-gyu

Park Hae-joon

as Joon-soo

Seo Young-hee

as Mi-ok

Yoon Kyung-ho

as Detective Ma

Jo Bok-rae

as Lee You-no

Lee Hae-yeong

as Team Leader Seo

Ji Dae-han

as Jang-ho

Choi Seong-won

as Detective Jo Young-chu

Park Seong-il

as Detective Song

Lee Eon-jeong

as Han Seo-young

Hong Eun-taek

as Gun-woo

Jo Wan-ki

as Suk-hwan

Lee Chung-hee

as Yang Min-a

Kwon Hyuk

as Han Tae-woong

Lee Il-hwa

as Detective Noh's Wife

Min Moo-je

as Sun-hye's Husband

Oh Jung-se

as Hospital Patient

Kwak Eun-jin

as Hot Barista

Park Jun-myun

as Bakery Shop Woman

Kim Ju-hun

as Boss