These are some of the toughest prisons in the world. Prisons so tough, even gang bosses and killers learn the meaning of fear. Across four continents, six different prisons, the series takes us beyond the gates, walls, barred windows and cells into an unknown world, a world we know exists, but a world nobody wants to think about.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Tent City Jail, Phoenix, Arizona, USA | 2016-06-16 | 45 min |
| Season 1 | Episode 2 | San Pedro Prison, La Paz, Bolivia | 2016-05-16 | 45 min |
| Season 1 | Episode 3 | Dallas County Jail, Dallas, Texas, USA | 2016-05-16 | 45 min |
| Season 1 | Episode 4 | Sofia Central Prison, Sofia, Bulgaria | 2016-05-16 | 45 min |
| Season 1 | Episode 5 | Miami Dade County Jail Boot Camp, Miami, Florida, USA | 2016-05-16 | 45 min |
| Season 1 | Episode 6 | Antanimora Prison, Madagascar | 2016-05-16 | 45 min |
| Season 2 | Episode 1 | Carcel Distrital, Bogota, Colombia – Part One | 2018-07-06 | 45 min |
| Season 2 | Episode 2 | Carcel Distrital, Bogota, Colombia – Part Two | 2018-07-06 | 45 min |
| Season 2 | Episode 3 | Colony 100, Kharkiv, Ukraine | 2018-07-06 | 45 min |
| Season 2 | Episode 4 | South Cotabato Jail, Philippines | 2018-07-06 | 45 min |
| Season 2 | Episode 5 | El Hongo, Tecate, Mexico | 2018-07-06 | 45 min |
| Season 2 | Episode 6 | Armavir Prison, Armenia | 2018-07-06 | 45 min |
| Season 2 | Episode 7 | La Mesa, Mexico | 2018-07-06 | 45 min |
| Season 3 | Episode 1 | Urso Branco, Brazil | 2021-11-28 | 45 min |
| Season 3 | Episode 2 | Colony 8, Zhytomyr, Ukraine | 2021-12-12 | 45 min |
| Season 3 | Episode 3 | Maafushi Central Prison, Maldives | 2021-12-26 | 45 min |
| Season 4 | Episode 1 | New Bilibid Prison | 2024-03-09 | 45 min |
| Season 4 | Episode 2 | Lepoglava, Croatia | 2024-03-10 | 45 min |
| Season 4 | Episode 3 | Taichung Men's Prison, Taiwan | 2024-03-17 | 45 min |
