Gong Yoo
Ki-heon

Park Bo-gum
Seo Bok

Jo Woo-jin
Chief Ahn

Jang Young-nam
Dr. Im Se-eun

Park Byung-eun
Shin Hak-sun

Yeon Je-wook
Section Chief Heo

Kim Hong-pa
Bureau Director Bae Guk-jang

Lee Eon-jeong
Yoon Hyun-Soo

Na Kwang-hoon
Kim Walker

Kim Jae-geon
Chairman Kim Chun-oh

Andreas Fronk
John Kane

Paul Battle
Carl Anderson

Yoon Sang-hoon
Dr. Song

Han Ji-hyun
Yong Ju

Maurice Turner Jr.
Foreign Mercenary

Baek Do-kyeom
Agent

Yun Ki-chang
Agent

Lee Yo-sung
Chasing Police Officer

Jo Yeon-ho
Young Min Gi-heon

Jo Jin-kyul
NIS Agent

Ahn So-ye
Crosswalk Kid

Kim Kyu-do
Seoin Researcher

Ki Hwan
Intelligence Bureau Team Leader

Joey Albright
Mercenary

Jung Mi-nam
Mercenary

Shin Sung-il
Mercenary

Cha Ji-won
Researcher

Park Sang-hoon
Intelligence Bureau Agent

Lee Sang-kyung
Intelligence Bureau Agent

Joung Young-sub
Intelligence Bureau Agent

Yang Hee-woo
Gas Station Employee

Kim Sang-dong
Market Vendor

Lim Jae-min
Extraction Room Researcher

Kim Kye-hyung
SWAT Member

Kim Yong-jun
Man in Rear Car Dispute

Jin Si-won
Seoin Security Agent

Chae Yeon-jung
Ki-heon's Mother