Undercover Prison King has 80 episodes (ongoing).
Narato Studio
You can watch Undercover Prison King online on Runotoon, in the web browser on your phone or computer. There is no app to download. Start with Episode 1.
The first 10 episodes are free, and you don’t need an account to start. Each of the other episodes unlocks with 15 Coins. A new free account comes with 75 Coins, you can collect free Coins every day, and Runotoon Pass adds Coins every week. It is included in Runotoon Pass: Pass members open every episode without Coins.
Undercover Prison King has 80 episodes on Runotoon so far, and new episodes are still coming. Together they run about 111 minutes. The latest episode came out on October 25, 2026.
When ex-soldier Troy Poe inherits a corrupt private prison, he decides to go in undercover as an inmate to expose those responsible. But when the head guard, a man who he trusted, turns out to be the leader of the crime ring, Troy must find a way to convince the officials that he is not a prisoner, but in fact, the owner of the prison... or break out. All the while, he must protect those in danger, including a weak old prisoner whose sentence has been falsely extended, and a beautiful doctor who's caught in the crossfire. Will Troy find a way to escape? Or will he become just another casualty of his own prison?
Yes. Its original language is English, and it has subtitles in German, Spanish, Filipino, French, Indonesian, Italian, Portuguese, Thai, and Vietnamese. Some languages may not cover every episode yet.
