Transgender inmates; inmates with dreams of stardom.

Frustrated inmates reach their breaking point.

In prison time can be an inmates worst enemy.

Los Angeles coroner's investigators.

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

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

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

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

Decisions made inside prison.

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

Long periods of monotony are broken up by brief moments of terror.

Every murder has a motive and often the crime is committed by the least likely person.

Three inmates prepare to cross the threshold to freedom.

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.

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

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

Addiction leads to serious crimes to support bad habits.

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.

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.

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.

The story of capital punishment through the eyes of young people whose lives have been shaped by it.

High-school student K.C. Cooper is a math whiz with a black belt in karate. A normal teen otherwise, her life changes when her parents, Craig and Kira, recruit her to be a spy in a secret government agency known as The Organization. Along with her parents and younger siblings Ernie and Judy -- the latter is a humanoid robot -- K.C. must balance a civilian existence with undercover missions designed to save the world. As K.C. goes about spying, she must keep the newfound career a secret from best friend Marisa.

Drawing on her years as a prosecutor and her decades of experience as a journalist, Greta Van Susteren's weekday show features analysis of the day's biggest political stories. Van Susteren interviews distinguished officials from both sides of the aisle for a balanced discussion that provides clarity on where Washington insiders and leaders stand on critical issues. Van Susteren finishes each show with her "For the Record" segment, which highlights stories that viewers may not have seen reported elsewhere.