Pemeran Good Boy

Park Bo Gum (박보검)

as Yun Dong Ju

Pemeran Utama

Kim So Hyun (김소현)

as Ji Han Na

Pemeran Utama

Oh Jung Se

as Min Ju Yeong

Pemeran Utama

Lee Sang Yi (이상이)

as Kim Jong Hyeon

Pemeran Utama

Heo Sung Tae

as Ko Man Sik

Pemeran Utama

Tae Won Seok

as Sin Jae Hong

Pemeran Utama

Lee Ho Jung

as “Drug Monster” / “Drugmon”

Pemeran Pembantu

Jung Man Sik

as O Jeong Gu [Former national boxing team coach]

Pemeran Pembantu

Seo Hyun Chul

as Hwang Gyeong Cheol [Chief of police]

Pemeran Pembantu

Park Chul Min

as Kim Geum Nam [Pawn shop owner]

Pemeran Pembantu

Seo Jung Yeon

as Jung Mi Ja [Noodle restaurant owner]

Pemeran Pembantu

Han Kyu Won

as An Dae Yong [Team leader]

Pemeran Pembantu

Ko Jun

as Leo

Pemeran Pembantu

Kim Eung Soo

as Cho Pan Yeol [Commisioner]

Pemeran Pembantu

Lee Ji Hye

as Jung Gyeong Mi [Police officer]

Pemeran Pembantu

Nam Jin Bok

as Section Chief Lee

Pemeran Pembantu

Kim Seo Kyung

as Kim Seok Hyeon [Prosecutor]

Pemeran Pembantu

Ahn Se Ho

as Baek Seok Chun [Northeastern syndicate boss]

Pemeran Pembantu

Jung Jae Won

as Lee Gwang Se [Smuggler]

Pemeran Pembantu

Moon Jung Dae

as [Сriminologist]

Pemeran Pembantu

Han Sang Bin

as Lee Jong Hun

Pemeran Pembantu

Lee Kun Goo

as [Gangster] (Ep. 1)

Bintang Tamu

Son Ki Chul

as [Reporter] (Ep. 1)

Bintang Tamu

Yoo In Soo (유인수)

as Bong Da Ri / “Bagboy” [Golden Bunny leader] (Ep. 1)

Bintang Tamu

Lee Jung Ha (이정하)

as Lee Gyeong Il (Ep. 1-3, 5)

Bintang Tamu

Lee Han Sol

as Lee Jin Su [Export officer] (Ep. 1, 4-5)

Bintang Tamu

Lee Soo Mi

as [Grocery store owner] (Ep. 2, 6-8, 14-15)

Bintang Tamu

Choi Woo Jin

as Dr. Choi U Jin (Ep. 2, 8)

Bintang Tamu

Kim Eun Kyung

as [Neighborhood woman] (Ep. 2, 14)

Bintang Tamu

Kim Chan Hyung

as Correctional Officer Han (Ep. 3)

Bintang Tamu

Kim Ye Jun

as Kim Jong Hyeon [Teen] (Ep. 3)

Bintang Tamu

Choi Woo Rok

as Kim Seok Hyeon [Teen] (Ep. 3)

Bintang Tamu

Kim Jong Hyeon

as [Realtor] (Ep. 3)

Bintang Tamu

Im Chul Hyung

as [Police captain] (Ep. 3)

Bintang Tamu

Song Young Chang

as O Bong Chan / "O Dollar" [Smuggler] (Ep. 3, 11-12)

Bintang Tamu

Kim Ji Yoo

as Ji Han Na [Child] (Ep. 4, 13)

Bintang Tamu

Lee Da Eun

as [Shooter] (Ep. 5)

Bintang Tamu

Choi Woo Jung

as [Nurse] (Ep. 5)

Bintang Tamu

Lee Ji Hoon

as Lee Hun [Neurosurgeon] (Ep. 5, 7, 10)

Bintang Tamu

Lee Yoon Jae

as [Chief prosecutor] (Ep. 5, 16)

Bintang Tamu

Kwon Dong Ho

as Park Bong Pil [Drug manufacturer] (Ep. 6)

Bintang Tamu

Ha Seung Yeon

as [Police officer] (Ep. 6)

Bintang Tamu

Kang Hak Soo

as [Manager] (Ep. 6)

Bintang Tamu

Han Sang Chul

as [Awakened man] (Ep. 6)

Bintang Tamu

Sung Ji Ru

as No Deok Gyu [Mayor] (Ep. 6, 8-11, 13, 15)

Bintang Tamu

Lee Seo Jin

as Yun Dong Ju [Child] (Ep. 6, 10)

Bintang Tamu

Oh Jung Tae

as Dae Po Dong (Ep. 7)

Bintang Tamu

Joo Jin Soo

as [Tour guide] (Ep. 7)

Bintang Tamu

Choi Young Min

as [Doctor] (Ep. 8)

Bintang Tamu

Yoon Jong Goo

as [Protest leader] (Ep. 8-9)

Bintang Tamu

Lee Gyu Sub

as [Yakuza leader] (Ep. 9)

Bintang Tamu

Gi Hwan

as [Fencing announcer] (Ep. 9)

Bintang Tamu

Park Chul Min

as [Fencing announcer] (Ep. 9)

Bintang Tamu

Lee Su Hyung

as [Interpreter] (Ep. 9, 11)

Bintang Tamu

Song Hoon

as Richard Jung (Ep. 10)

Bintang Tamu

Ko Ju Ni

as “Drugmon” [Child] (Ep. 10-11)

Bintang Tamu

Woo Soo Bin

as Detective Kang (Ep. 11)

Bintang Tamu

Ri Min

as [Retired detective] (Ep. 11)

Bintang Tamu

Oh Yong Seok

as [Hyedong Oil gangster] (Ep. 11)

Bintang Tamu

Kim Hee Won

as [Sports commission clerk] (Ep. 11-12)

Bintang Tamu

Ilya Belyakov

as Sergei Kirillovich Vronsky (Ep. 11-14)

Bintang Tamu

Shin Kang Kyun

as [Watch seller] (Ep. 12)

Bintang Tamu

Min Sang Chul

as [Crime scene investigator] (Ep. 12)

Bintang Tamu

Kim Dae Geun

as [Gangster] (Ep. 12-13)

Bintang Tamu

Lee Young Joo

as [Doctor] (Ep. 12, 15)

Bintang Tamu

Lee Jung Choon

as Lee Yong Ju (Ep. 14)

Bintang Tamu

Jun Sung Won

as [Truck driver] (Ep. 14)

Bintang Tamu

Yun Ho Rim

as [Athlete] (Ep. 14)

Bintang Tamu

Choi Seong Hyuk

as [Detective] (Ep. 15)

Bintang Tamu

Lee Ki Sub

as Investigator Jang

Bintang Tamu

Shin Moon Sung

as Section Chief Song

Bintang Tamu

Yoon Sang Won

as Yang Cheon Bae [Gang member]

Bintang Tamu

Park Jeong Woo

as Ryuga [Northeastern Syndicate member]

Bintang Tamu

Lee Chan Jong

as [Detective]

Bintang Tamu

Lee So Geum

as [Ex-convict]

Bintang Tamu

Lee Dong Gyu (이동규)

as [Anchorman]

Bintang Tamu

Yeom Ji Hye

as [Anchorman]

Bintang Tamu

Im Seung Min

as [Teen shooter]

Bintang Tamu

Kim So Yang

as [Police officer]

Bintang Tamu

Kang Myoung Soo

as [Supreme prosecution criminal chief]

Bintang Tamu

Konstantin Romanenko

as [Russian mafia]

Bintang Tamu

Park Hee Jung

as [Police officer]

Bintang Tamu

Kang Do Yoon

as Misha [Russian mafia]

Bintang Tamu

Kim Jin Mok

as Sin Ha Min

Bintang Tamu

Noh Won Jae

as Min Ju Yeong [Young] (Ep. 11)

Bintang Tamu

Shim Na Yeon

Sutradara

Kim Woo Taek

Producer

Lee Dae II

Screenwriter

Shin Chae Rin

as Ko Jeong A [Child] (Ep. 6)

Cameo