Mr. Hong

Yun Jeong-jae

Jug Gi-yeong

Eun-gyeol's Father

Ha Young-doo

King Lee Ho

Hwang Hyeon-do

Self

Kim Kang-su

Lee Shi-heum

An Hyeon-seong

Hwang Hee-tae (adult)

Kim Yoon Cheol

Seok Oh-won

Team Leader Gwi

Himself

Hwang Seok-Joo

Lee Jae-Joon

Hwang Chi-young

Han Jae Young [Yeo Reum's father]

Jang Pil-Sung

Joo Hyun-Ki

Nam Chul Doo [Hong Joo's father]

An Ji-Gong

Sung Tae-Pyung

Cha Jae Gook

Kim Woo-Cheol

Lee Joon-ho/Lee Joon-yeong

Chief Ahn Gook

Chae Je-gong

[Climbing coach]

Kim Do-jin

Yoon Jae-ho

Ki Soo

Kim Chul-gyu

Self

Yoon Min-joon

Chae Ki-hoon

General Gyebaek