By Dramabeans
Khan Lee, Park Cheol-hwan, Kwon Hyuk-chan
Lee Soo-Yeon
10
Disney+, (International), Hulu, (United States)
South Korea
Korean
Source: Wikipedia
Ko Han-seung, Sae-byeok's superior
Man from the future
Songje Police Station Detective
The ghost the founder of the Grid
Young Sae-ha
Kim Ma-nok / Lee Si-won, a murderer
Song Eo-jin, an employee of the Grid Bureau
Choi Sun-wool, the Deputy Director of the Grid Bureau
Younger Soo-geun
Jung Sae-byeok, a detective
Jung Him-chan, Sae-byeok's younger brother
Unknown person