For some prison might be hell and it can be even worse for the sex offenders.

Relationships on the inside can be more complicated than on the outside.

Solitary confinement is one of the most common methods for disciplining inmates, but it's also a very controversial issue.

Addiction leads to serious crimes to support bad habits.

A look at female inmates that start off socializing, but end up creating a lot drama for the staff.

For better or worse, time behind bars changes everyone.

The crew's take on being in prisons and jails across the U.S. and the world for over a decade.

One inmate takes a grim field trip; an inmate offers clues to an Ohio sex slave mystery.

No escaping the consequences of one's actions behind bars.

Transgender inmates; inmates with dreams of stardom.

In prison time can be an inmates worst enemy.

Los Angeles coroner's investigators.

The invisible lines between right and wrong and freedom and jail time.

Using inmates to turn troubled teens away from a life of crime; inmates express their regrets.

The relationships formed between inmates inside and outside of jail often take unexpected turns.

An exploration of first-time inmates that look like they should be sitting in classrooms rather than jail cells.

Additional footage from the "Lockup" series.

Jail stays are getting longer and many inmates have very little, leading to violence erupting over any perceived slight, especially if it involves food.

The troublemakers of the jail system and how correctional officers control the situation caused by these troublemakers.

Sometimes life has other plans, like when the ex-leader of a white supremacist gang faces a whole new reality, and discovers the price for coming clean.

How gangs are managed in the jail system; how family relationships affect the jail experience.

This documentary series takes viewers inside prisons and jails across America and around the world, offering rarely obtained and comprehensive access into these locations. The show profiles the inmates and employees who work at these facilities, highlighting their day-to-day experiences and interactions within the confines of prison. By bringing audiences the real, raw stories of life behind bars, this program aims to provide a truly authentic and in-depth look inside the complex criminal justice system.

The behind-the-scenes series goes international, taking viewers behind bars in prisons in countries around the world. From an abandoned, underground execution chamber in Serbia where prisoners faced death by firing squad to a special room for conjugal visits in a Belgian facility, cameras hunt out the details of prisoner life in other countries.

Sacramento, Calif., is the setting for this entry in MSNBC's long-running "Lockup" franchise, which has taken viewers inside jails in cities throughout America, along with some international locales, during its run. Sacramento County Jail is the featured prison for this season. Regardless of the show's location, the storylines featured on the docuseries are familiar to regular viewers, with fighting among inmates a regular "Lockup" sighting. Prisoners also discuss life in the facility and the crimes that landed them there.

The phrase "ball and chain" takes on a whole new meaning in "Love after Lockup." Couples meet their potential future spouses for the first time once the bars are removed from the relationship. The way is full of bumps -- and some strong emotions -- along its rocky road, but these inmates are tasting freedom for the first time in a long while. Join them as they leave their paper and pen behind and jump straight into dating, meeting the family and experiencing other first-time, nerve-wracking moments.

There are creatures both legendary and unidentified roaming the Appalachian Mountains, and a band of hard-core hunters and trappers have made it their life's work to investigate them. For generations, supposed sightings of these monsters -- with such names as Wolfman, Devil Dog, Wampus Beast, Mothman and Lizard Demon -- have occurred along the 1,500-mile stretch of mountains, and it wasn't until the members of the Appalachian Investigators of Mysterious Sightings had their own personal encounters with these creatures that they became believers. Now, the AIMS crew, led by founders "Trapper" John Tice, Jeff Headlee and Willy McQuillian, use both traditional techniques and modern technology to track, trap and capture these monsters. Maybe AIMS will snag its first one while cameras are filming "Mountain Monsters"!

"Lockdown" plunges viewers headfirst into life in the "big house," the gritty underworld of America's maximum-security prisons, where gangs are prevalent, predators stalk their next prey and inmates are armed with deadly weapons. But prison officials have their own weapons in the form of modern surveillance and old-time isolation -- plus steel batons and pepper spray -- to help keep the peace in these miniature war zones.