Imagine prisons so tough that even the hardest gang bosses and murderers learn the meaning of fear. This extraordinary series offers intimate portraits of crime and punishment set within the gates, walls, barred windows, and cells of the world's toughest maximum-security prisons. From Bolivia to Bulgaria, Dallas to Arizona, viewers meet hardened criminals with stories that shake them to the core.
| Season | From | To | Episodes |
|---|---|---|---|
| All Seasons | |||
| Specials | 0 | ||
| Season 1 | May 2016 | June 2016 | 6 |
| Season 2 | July 2018 | 7 | |
| Season 3 | November 2021 | April 2023 | 6 |
| Season 4 | February 2024 | July 2024 | 6 |
| Season 5 | November 2025 | 6 | |
| Unassigned Episodes | 1 |
| Season | From | To | Episodes |
|---|---|---|---|
| Unassigned Episodes | 32 |
| Season | From | To | Episodes |
|---|---|---|---|
| Season 1 | 0 | ||
| Unassigned Episodes | 32 |
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