Yoo Ji-tae

as Professor

12 episodes

Park Hae-soo

as Berlin

12 episodes

Jeon Jong-seo

as Tokyo

12 episodes

Lee Won-jong

as Moscow

12 episodes

Kim Ji-hoon

as Denver

12 episodes

Jang Yoon-ju

as Nairobi

12 episodes

Lee Hyun-woo

as Rio

12 episodes

Kim Ji-hoon

as Helsinki

12 episodes

Lee Kyu-ho

as Oslo

12 episodes

Lim Ji-yeon

as Seoul

12 episodes

Yunjin Kim

as Seon Woo-jin

12 episodes

Kim Seung-o

as Cha Moo-hyeok

12 episodes

Lee Si-woo

as Anne Kim

12 episodes

Lee Ju-bin

as Yun Mi-sun

12 episodes

Park Myung-hoon

as Cho Young-min

12 episodes

Kil Eun-sung

as Park Chul-woo

12 episodes

Park Soo-young

as Yoon Chang-soo

12 episodes

Jang Hyun-sung

as Kim Sang-man

12 episodes

Lee Yoon-hee

as Ri Cheong-myung

12 episodes

Shin Soo-Ho

as Park Jae-wook

12 episodes

Jeong Jae-seong

as Marshal Kim

12 episodes

Lee Chang-hoon

as Oh Jae-Yun

12 episodes

Lee Yong-nyeo

as Park Pil-Soon

12 episodes

Lim Hyung-kook

as Jeon Yong-Su

12 episodes

Hong In

as Hwang Hyun-Ho

12 episodes