as Doctor Oh (Prologue)

as Na Dae-bok

as Hong Jae Hun [Director of Planning and Coordination]

as Cho Hyeon-sik

as Former Team Leader

as Gong Moon-sik

as Ryu Geun-deok

as Kim Bok-nam

as Choi Won-bong

as Uncle Broker

as Gi-nam

as Dr. Cheon's Grandfather

as Seo Moon-choon

as Choi Yong Sik

as Polearm seller

as Son Yong-rak

as Jang Jon-ho

as Park Pil-joo

as Seong-bong

as Sergey

as Heo Gil-pyo

as CEO Hwang

as Cho Gi-bong

as Kim Hyeon-cheol

as Choi Go

as Ryu Seung-deok

as Bin-dae

as Ahn Gi-chang

as Park Choong-Jae

as Hwang Byeong-cheol

as Jung Se-joon

as Nam Seong-hwan

as Jo Sun-saeng

as Boss Jeong

as Kong Soo-Rae

as Ma Dong-sik

as Park Gyu-ho

as Kwon Hyeon-seok

as Math Teacher

as Ko Dok-seong

as Team Leader

as Kim Eung-jib

as Sun-joo

as Kang Jae-Sik

as Lee Dong-Soo

as Gil Gong-Tae

as Han Sang-Sub

as Jang In-Kyu

as Park Tae-hee

as Yoon Suk-ho

as Kim Jung-Soo

as Peninsula Hotel Manager

as No Won-hae

as Choo Nam-ho

as Kim Kwang-bok / Oh Dol-pyo

as Na Gwang-Gyun

as Choi Dam-dong

as Crime Department Chief Jo

as Kim Gye-cheol

as Seok-Hwan

as Kim Gye-Chul

as Akeo / Alligator

as Goo-cheol

as Chief Ban

as Young-chul

as Police Officer

as Min Byung-Ho

as Kim Won-Hae

as Woo Reuk

as Kim Gye-chul

as Mr. Kim

as Kim Moo-young

as Tank Commander

as Program host

as District Magistrate (cameo)

as Son Se-Woon

as Taxi Driver

as Artist Jo

as Bae Seol

as Choon-seop

as Han Yeong-seok

as Park Young-ho

as Unidentified Mr. Jang

as Baek Seong-chul

as Eunuch Hong

as Teacher

as Self - Various Characters

as Lee Myung-gook

as Han-gil

as Police Officer

as Self

as Ko Seong Jae