Chinese Title: Circle：相連的兩個世界
Also known as: Circle: Two Connected Worlds
Genre: Sci-fi, Mystery
Broadcast network: tvN
Episodes: 12
Broadcast period: 2017-May-22 to 2017-June-27
Air time: Mondays & Tuesdays 23:00
Synopsis
Set in the present (2017) and the future (2037), the story is about an alien invasion in 2017 and the subsequent new Earth in 2037; which is separated into the “Smart Earth” where people’s emotions are controlled and no crimes and illness exist, and the “General Earth” where people still suffer from rampant plague and lawlessness.
Cast
Main Cast
Yeo Jin Goo as Kim Woo Jin (Beta Project)
– Jung Ji Hoon as Kim Woo Jin (child)
Kim Kang Woo as Kim Joon Hyuk (Brave New World)
Gong Seung Yun as Han Jung Yun (Beta Project)
Lee Ki Kwang as Lee Ho Soo (Brave New World)
Ahn Woo Yeon as Kim Bum Kyoon (Beta Project)
– Kim Ye Joon as Kim Bum Kyoon (child)
Jung In Sun as Park Min Young (Beta Project)
People around Woo Jin (Beta Project)
Seo Hyun Chul as Hong Jin Hong
Oh Ui Shik as Lee Dong Soo
– Jung Joon Won as Dong Soo (Child)
Shin Dam Soo as Detective Choi
Kim Joong Ki as Kim Gyu Chul
Handam University people (Beta Project)
Song Young Kyu as Han Yong Woo
Han Sang Jin as Park Dong Gun
Shin Joo Hwan as Sunbae Lee
General District people (Brave New World)
Seo Hyun Chul as Hong Jin Hong
Oh Ui Shik as Lee Dong Soo
Kim Min Kyung as Doctor Park
Kwon Hyuk Soo as Detective Oh
Smart District people (Brave New World)
Min Sung Wook as Lee Hyun Suk
Nam Myung Ryul as Yoon Hak Joo
Yoo Young as Secretary Shin
Choi Ji Hun as Kim Min Ji
Gong Seung Yun as Bluebird