The mark of Cain: the russian criminal tattoo, episode 3. The first episode can be seen here and the second episode can be seen here. The 3rd episode can be seen here
In this episode: details about the White Swan, the toughest prison in Russia
A tough convicted has the right to get a tattoo on the eyelids - usually a message like "Don't dare to wake me up!" - an avertisment for the other convicted to keep quiet when the tough guy is sleeping.