Park Moo-kyung (1 episode)

Father Antonio (1 episode)

King Wharton III (1 episode)

Detective

Prince Geumseong

Gong Eun-tae (1 episode)

Nam Gi-seok (7 episodes)

Self (1 episode)

(1 episode)

Yoo Eun-ho (12 episodes)

Self (1 episode)

Gi-cheol

Seo Dong-jae (10 episodes)

Kwon Hyung-jin

Self (2 episodes)

Jo Gang-ok (8 episodes)

(1 episode)

Self (1 episode)

Self (2 episodes)

Joo Seong-cheol

(1 episode)

Self (1 episode)

Jang Do-yul (16 episodes)

Yoo Tae Han (12 episodes)

Jin-tae

Ji Hyung Jo (24 episodes)

Oh Young-seok (16 episodes)

Han Jeong-woo

First Lieutenant Park Moo-sin

Ji Young-Hoon (36 episodes)

Ye Jae-Wook (16 episodes)

Park Hae Joon (2 episodes)

First Lieutenant Park Moo-sin

Seo Dong-jae (32 episodes)

Kang Chul Soo (4 episodes)

Chul Soo (10 episodes)

cafe owner

Kim Ji-wan (50 episodes)

Kang Dong-wook (16 episodes)

Chul-min

Du Yufeng (33 episodes)

Lee Jang-il (20 episodes)

Kim Young Joo (20 episodes)

Himself (1 episode)

NIS Agent

Lee Joon-gi (16 episodes)

Min Jang-soo (20 episodes)