Choi Won-young

as Nora's Dad

as Yoon Jae-ho

as Jung Tae-suk

as An Ji-Gong

as Lee Chan-young

as Chief Ahn Gook

as Jug Gi-yeong

as Eun-gyeol's Father

as Nam Chul Doo [Hong Joo's father]

as Park Chan-soo

as Lee Joon-ho/Lee Joon-yeong

as King Lee Ho

as Yun Jeong-jae

as Hwang Chi-young

as Team Leader Gwi

as Choi Dong-hyeon

as Hwang Hee-tae (adult)

as Lee Jae-Joon

as Hwang Hyeon-do

as Han Jae-young

as Cha Jae Gook

as Ha Young-doo

as General Gyebaek

as Jeong Yak-jong

as Kang Myeong-hwi

as Seok Oh-won

as Kang Byung-soo

as Joo Hyun-Ki

as Han-seok

as Shin Gi-jung

as Kim Woo-Cheol

as Kim Do-jin

as Lee Shi-heum

as Lim Sa-hyeong

as Baek Seung-gi

as Detective Kang

as An Hyeon-seong

as Chae Je-gong

as Han Joon-seok

as Self

as Kim Young-ho

as Hong Yoon-sung

as Sung Tae-Pyung

as Seok Ho

as Hwang Seok-Joo

as Kim Yoon Cheol

as Chae Ki-hoon

as Self

as Park Sung-chul

as Jang Pil-Sung

as Ki Soo

as Self

as Kim Kang-su

as Self

as Ji-hoon

as Dong-kyu

as Kim Chul-gyu

as Mr. Hong

as Tae-seong

as [Climbing coach]

as Seok-ho

as Jack (voice)

as Sang-hun

as Kyung Woo

as Yoon Min-joon