Episode 1
At Finland's Kylmäkoski prison, Raphael meets violent offenders in the general population wing and bonds with the inmates, while a newcomer is attacked.
Episode 2
Surrounded by many inmates who struggle with crystal meth addiction, Raphael enters the Pilsen prison and discovers that some habits are hard to break.
Episode 3
Raphael gets a rare look inside Bangli prison, where drug offenders are forced to join a rehabilitation program and isolation is used as punishment.
Episode 4
At the Rove maximum security prison, many of the inmates serve time for sexual offenses while navigating grim conditions and extremely limited resources.
