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.

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.

The "Lockup" franchise has become a staple of the MSNBC schedule, with each series in the franchise taking place in a different prison. This entry is filmed at the Wabash Valley Correctional Facility in the rural Indiana town of Carlisle. The prison's population, 2,200 male inmates, dwarfs the town's population of just several hundred residents. The majority of Wabash's inmates used to come from urban areas, but now they come mainly from rural farming communities, because of the rise of methamphetamine use. Many of the stories in the series revolve around the meth epidemic and the strict sentences that are handed down, including half brothers who are serving 54- and 35-year sentences for various meth-related crimes. Also housed at Wabash are several of Indiana's high-profile murderers.

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.