
Circle
After Aliens arrive, the story takes place in two time streams: 2017 and 2037. In twenty years, and by 2037, the world has been divided into a “Smart Earth” where artificial intelligence has created a utopian environment in which no diseases or crimes exist, and an “Ordinary Earth” where people still suffer from rampant plague and lawlessness.

Yeo Jin-goo
Kim Woo-Jin

Kim Kang-woo
Kim Joon-Hyuk

Gong Seung-yeon
Han Jung-Yeon

Lee Gi-kwang
Lee Ho-Soo

Kwon Hyuk-soo
Detective Oh

An Woo-yeon
Kim Beom-Gyoon

Kim Joong-ki
Kim Kyu-Cheol

Min Sung-wook
Lee Hyun-Seok

Nam Myung-ryeol
Yoon Hak-Joo

Lee Hwa-Kyum
Secretary Shin

Seo Hyun-chul
Hong Jin-Hong

Song Young-gyu
Hwang Yong-Woo

Oh Eui-sik
Lee Dong-Soo

Kim Ye-joon
Kim Bum-gyun (young)

Jung Ji-hoon
Kim Woo-jin (young)

Jung In-sun
Park Min-young