Park Ji-il

Prime Minister • 3 episodes

In-ah's father • 2 episodes

Assemblyman Baek Sang-hwa • 4 episodes

Bishop

Min Je • 14 episodes

Go Jung-cheon

Moon-cheol

Park Ji-yong's Butler

Cha Woong • 12 episodes

Jo Moon-ho • 16 episodes

Cha Yoo-hyuk • 12 episodes

Baek Seung-ryong • 16 episodes

Min Sung-Sik • 20 episodes

Kim Gye-hoon

Polaris

Nam Woo Hyun • 32 episodes

Kim Byeong-Dae • 20 episodes

Kwon Jae-bok [Jung-rok's father] • 1 episodes

Song Bong-gil • 48 episodes

Ho-min's Father

Yoon Hyun

Jun-young's father • 16 episodes

Director Park

Deputy Chief Scholar

General manager Lee

Seol Jae-Chan • 41 episodes

Na Ki-chul • 24 episodes

Manager Nam • 20 episodes

K-CIA Officer

Lee Suk-Ho • 51 episodes

Song Ik-pil • 50 episodes

Father Kim

Executive Director Song

Executive Moon • 20 episodes

Kim Shim-Eon • 78 episodes

Sin Han-pyeong

Oh Young Sook's husband • 16 episodes

Choi Chi-Soo • 52 episodes

Mr. Lee

Team Leader, Defense Research Institute

Bank Clerk

Public Servant

Jang Woo-shin

Kim Gi-rim

"Pride and Mercy"