퀴즈왕

Han Jae-suk

Sang-kil

Kim Soo-ro

Lee Do-yeop

Ryu Seung-ryong

Kim Sang-do

Jang Young-nam

Jang Pal-nyeo

Ryu Deok-hwan

Oh Cheol-ju

Shim Eun-kyung

Kim Yeo-na

Im Won-hee

Lee Joon-sang

Shin Ha-kyun

Doctor of Engineering

Jung Jae-young

Man in Taekwondo uniform

Jang Jin

Captain Ma (uncredited)

Gong Ho-seok

Officer Gong (uncredited)

Ahn Soo-ho

Bureau Director (uncredited)

Han Ye-ju

Han Soon-kyung

Park Kyung-man

Park Joon-seo

Park Jeong-gi

Police