Grid Season 1 Episode 8 Episode 8 ( Air Date 2022-04-06 ) Genre Sci-Fi & Fantasy, Mystery, Action & Adventure category. Overview "In 1997, a mysterious ghost saved humankind and then disappeared. The mysterious ghost appears again 24 years later and helps a serial killer escape. Kim Sae Ha, Jung Sae Byeok and Song Eo Jin pursue the ghost for different reasons.".