Song Hye-kyo
Kang Mo-yeon

Song Joong-ki
Yoo Shi-jin

Kim Ji-won
Yoon Myung-joo

Jin Goo
Seo Dae-young

Onew
Lee Chi-hoon

Kang Shin-il
Lieutenant General Yoon

Cho Tae-kwan
Daniel Spencer

Jo Jae-yun
Jin Young-soo

Hyun Jyu-ni
Doctor Pyo

Jeon Soo-jin
Ri Ye-hwa

Lee Seung-joon
Song Sang-hyun

Kim Min-seok
Kim Ki-bum

Ahn Bo-hyun
Sergeant Im Gwang-nam

David Lee McInnis
Argus

Lee Yi-kyung
Kang Min-jae

Kim Byung-chul
Park Byung-soo

Park Hwan-Hee
Choi Min-Ji

Elena Zhernovaya
Valentine

Jo Woo-ri
Jang Hee-eun

Tae In-ho
Han Seok-won

Seo Jeong-yeon
Nurse Ha Ja-ae

Park Hoon
Choi Woo-geun

Choi Woong
Gong Cheol-ho

Shin Dong-hoon
Agent

Kim Hyo Myung
Thug

Ariane Desgagnés-Leclerc
Valentine