Project Silence

Lee Sun-kyun

(Cha Jeong-won)

Ju Ji-hoon

(Jo Park)

Kim Hie-won

(Doctor Yang)

Moon Sung-keun

(Byeong-hak)

Ye Su-jeong

(Soon-ok)

Kim Tae-woo

(Jeong Hyeon-baek)

Park Hee-von

(Sim Mi-ran)

Park Ju-hyun

(Sim Yoo-ra)

Kim Su-an

(Cha Kyeong-min)

Ha Do-kwon

(Captain Kang)

Jang Kwang

(Defense Minister)

Choi Jung-woo

(Chief Secretary)

Ku Sung-hwan

(Bus Driver)

Park Ho-san

(Deputy Intelligence Commander)

Moon Byeong-ju

(BJ)

Song You-hyun

(Kyung-min's Mother)

Jang Tae-min

(Official)

Yoo Yeon

(Official)

Kwak Jin-seok

(Special Commander)

Ahn Seong-bong

(Staff Sergeant Ahn)

Kim Chang-hwan

(Control Room Staff)

Bae Myeong-jin

(Control Room Staff)

Lee Sang-won

(Lieutenant Lee)

Lee Mi-yun

(Adultery Couple)

Kwon Leafy

(Backpack Couple)

Shin Hee-cheol

(Backpack Couple)

Lim Yong-soon

(Chief of the National Intelligence Service)