Twin brothers Woo Jin and Bum Gyun encounter an alien as children, turning Bum Gyun dangerously paranoid as an adult in 2017. In 2037, Detective Kim and Chie... read more
Woo Jin doesn't know what to believe when a disturbingly familiar student joins his class. The trust between Detective Kim and the Smart Earth employees is d... read more
With Bum Gyun still missing, Woo Jin teams up with Jung Yeon to look further into the suicides. Joon Hyuk proposes going to Normal Earth to access Park Jin G... read more
With new clues to investigate, Woo Jin expedites his search for Bum Gyun. In the future, Jung Yeon informs Detective Kim of someone who may know Woo Jin's wh... read more
Woo Jin and Jung Yeon are disturbed to find out their fathers are not who they thought they were. Detective Kim must accept that Woo Jin's present may be dif... read more
Woo Jin is cornered into helping Professor Han look for lost research. Detective Kim prepares for a possible meeting with the mysterious chairman of Human B.
In the final episode, Woo Jin, Detective Kim, Jung Yeon, and their crew look for incriminating evidence against Park Dong Geun to take him down once and for ... read more