Behind the walls of six maximum-security prison in Serbia, Poland, and the Czech Republic.

Life inside prisons throughout Scotland and Belgium.

Cameras give a glimpse into prison conditions in Israel, venturing into three prisons there.

Cameras go behind the crumbling walls of San Quentin State Prison in California, where overcrowding and lack of modernization are blamed for an ever-increasing number of inmate attacks on guards. The facility, which has four cell blocks containing more than 800 prisoners each, also houses a number of death row inmates. As one guard bluntly explains, the attitude of many of the prisoners on death row is "You can only kill me once," so officers are on constant guard against attack.

Behind the scenes of the reality crime series "Lockup," as producers offer candid interviews and previously unaired footage of some of the most memorable inmates spotlighted on the program.

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.

More women than ever are working as guards in the toughest prisons in the U.S. This series brings cameras inside some of those facilities and, combined with interviews with female correctional officers, viewers witness firsthand the danger and mind games involved in this job.

In going behind bars of Georgia's correctional system, each episode of this series examines one aspect of the state's paramilitary approach to their prisoners, the idea being treat them like highly disciplined soldiers and they will stop acting like criminals. Over the course of a year, cameras capture both those who work in the system and those housed within it -- from nonviolent offenders in a boot camp to hardened criminals in "Hi-Max," the environment that allows the most extreme disciplinary methods.

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.

CNN is by and large still a cable news outlet, but a movement under the leadership of network president Jeff Zucker to provide more alternative, entertainment-based programming is clearly afoot, and "Death Row Stories" is a prime example. The eight-part documentary -- the result of a collaboration with Academy Award-winning directors Robert Redford ("Ordinary People") and Alex Gibney ("Taxi to the Dark Side") -- revisits compelling capital murder cases in the U.S., detailing the twists and turns involved in each as a thought-provoking exercise on the death penalty and the American justice system. "Dead Man Walking" Oscar winner Susan Sarandon is the narrator. Redford's Sundance Productions also partnered with CNN for the documentary series "Chicagoland."

"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.

Despite cameras and guards monitoring their every move, some prisoners are daring enough to test the system and execute a breakout. Told from the perspectives of both the escapees and the law enforcement teams tracking them, this series documents some of recent history's high-profile jailbreaks and the various methods officials use to outsmart the criminals, leading to their eventual recapture.