-MC ends up in prison
-MC is innocent but becomes savage
-MC shares a cell with one of the inmates who is also an inmate here in the Insider
-Satisfying plot
-wrongly accused in both

Pretty similar to the grid in terms of being futuristic and the action and the time travel part. Also gets you hooked since the first ep.

If you watched Kingdom , watch this next !!!
Every single monsters is so detailed and so insane. I loved how they didn't show many things which the webtoon had, now they show it in the season 2. Amazing acting from Song Kang, Lee Shi Young, Lee Do Hyun and everyone. Everything single scene was a slay. One of the best Korean drama of 2020. Must watch! They way I panicked in every episode is very scary.