i'm john siegenthaler. >>> due to mature subject matter viewer discretion is advised. >>> america's prisons, dangerous, often deadly. there are 2 million people doing time. every day is a battle to survive and to maintain order. >> down on your feet, now! >> among the nation's most notorious institutions, san quentin state prison. our cameras spent months documenting life on the inside, where gangs, drugs and sheer boredom make up a violent mix. this is "lockup san quentin: extended stay." many >> probably next to an inmate's release date, visits are the most important things in their lives. keeping in touch with their loved ones. >> i don't like coming here, but i have to so i can see him. >> for some, visits are rare moments of intimacy. and for others, a business transaction. >> a lot of drugs come in through the visiting room. a lot of drugs. >> you don't want to be here, man. >> and then the hustle just like the bona fide, hustler with the web and then with the two hands, like you said. >> the money. >> money in one hand, dice coming out the other. >> it's going to be hard. make sure t

i'm john siegenthaler. >>> due to mature subject matter viewer discretion is advised. >>> america's prisonsillion people doing time. every day is a battle to survive and to maintain order. >> down on your feet, now! >> among the nation's most notorious institutions, san quentin state prison. our cameras spent months documenting life on the inside, where gangs, drugs and sheer boredom make up a violent mix. this is "lockup san quentin: extended stay."