An Jung-geun (1 episode)

Kim Chun-chu / King Taejong Muyeol (1 episode)

Self (1 episode)

Director Sohn

(1 episode)

Agent Paul (4 episodes)

Kang Su-ho (14 episodes)

Director Han

Paul Chong Hasang

Jung Joon-hyeok (20 episodes)

Do-jin

Self (1 episode)

Kim Sun-woo

Ji-ho

(6 episodes)

Kang Tae Woo (32 episodes)

Jo Se-Hwang (32 episodes)

Bong-gil (2 episodes)

Himself (11 episodes)

Baek Kwang-hyun

Park Jin-han

Oh Jak-Doo (24 episodes)

Kim Joon-Hyuk (12 episodes)

Kim Hyo Chan (4 episodes)

Kim Hyo-chan

Min Seon-jae (20 episodes)

Investigator

Prince Yeonsan

吉秀贤 (10 episodes)

Dong-joon

Kang Do-Yoon (20 episodes)

Lee Woo-gon

Tae-kyu

Kim

Jung-ha's Younger Brother (cameo)

Yang Choon-dong

Lee Tae-sung (16 episodes)

Ahn Min-Chul

Joo Young-jak

Robot Repairman Park Do-won

Kim Cheol

Kang Jeongho

Kang Hyun-woo

Chae Do-woo (20 episodes)

Chun-soo

Kyu-chul

Shi jun (14 episodes)

Cho Kyung-yoon

Sung-chan

Kim Man-soo

Tak Jun-ha

Moggy

Yoon Seong-woo (11 episodes)

Ju-ho

Min-ho

Shin Moo-chul (16 episodes)

Private Cho