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.

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.

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.

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.

On May 30, 2005, 18-year-old Natalee Holloway disappeared on the island of Aruba. Her case resulted in a worldwide media frenzy, yet Natalee's body was never found, and her father, Dave Holloway, has never stopped searching for answers. Now, 12 years later, he's following what he believes to be the most credible lead to date: a detailed firsthand account from a man who claims to know the whereabouts of his daughter's remains, and the hope of finally getting a conviction of Joran van der Sloot. This true crime series follows Dave and T.J. Ward, the family's longtime private investigator, in the latest and perhaps final chapter of the decade-long pursuit to uncover what really happened to Natalee.