

These are some of the toughest prisons in the world. Prisons so tough, even gang bosses and killers learn the meaning of fear. Across four continents, six different prisons, the series takes us beyond the gates, walls, barred windows and cells into an unknown world, a world we know exists, but a world nobody wants to think about.

The docuseries follows people deeply involved in the group NXIVM — which is faced with various charges, including sex trafficking and racketeering conspiracy — over the course of several years.

Crime journalist Raphael Rowe goes behind the bars of some of the world’s most notorious and toughest prisons. Immersing himself in maximum security facilities around the world to live as a prisoner, he encounters the inmates locked up for their crimes and meets the men and women on the right side of law tasked with keeping the criminals behind bars.

Dash cams capture footage from urban and rural police forces while on the job. A live look inside the everyday calls of police officers across the nation.

Death row inmates convicted of capital murder give a firsthand account of their crimes in this documentary series.

In this true-crime documentary, a cult expert and filmmaker infiltrate a polygamist sect to expose a self-proclaimed prophet and bring him to justice.

With narrative driven exclusively by the detectives themselves, each episode ventures deep into the mind of a homicide detective as they describe in vivid detail the one case forever ingrained in their memory.

A 360-degree view of the trafficking world from the point-of-view of the traffickers, law enforcement agents and those caught in the crossfire with access only National Geographic can provide.

Serial killer Jeffrey Dahmer confesses to his gruesome crimes in unguarded interviews, offering an unsettling view into a disturbed mind.

From crippling payday loans to cars that cheat emissions tests, this investigative series exposes brazen acts of corporate greed and corruption.

Drugs: A multi-billion-dollar industry that fuels crime and violence like no other substance on the planet. Turning cartel leaders into billionaires, the illegal drug industry also provides vital income to hundreds of thousands of poor workers across the globe. While some users sacrifice their lives to an addiction they can't escape, others find drugs to be their only saving grace from physical or emotional pain almost impossible to overcome. Where should the lines be drawn in this lucrative industry?

The true stories of people who lived with a killer. How well do you really know your family? Would you recognize the warning signs? Or would you become entangled in evil?

Interviews with friends, family and Sally McNeil herself chart a bodybuilding couple’s rocky marriage — and its shocking end in a Valentine's Day murder.

An overgrown field and a stretch of highway connect a series of grisly murders spanning several decades as grieving families search for answers.

Recently discovered police recordings and first-person accounts tell the story of Fred and Rose West, two of the UK's most prolific murderers.

Dateline NBC, or simply Dateline, is a weekly American television newsmagazine series. It was previously the network's flagship newsmagazine, but now focuses mainly on true crime stories with only occasional editions that focus on other topics.

A “psychological exposé” into the minds of the most diabolical antagonists in WWE history and their impact on mainstream culture.

Millions in stolen cash. Missing luxury bourbon. Watch ordinary people almost get away with these extraordinary heists in this true crime series.

A four-part documentary series revolving around the case of single mother Barbara Hamburg, who was brutally murdered in 2010 near her home in the upper-middle class enclave of Madison, Connecticut. The series presents first-time filmmaker Madison Hamburg’s complicated journey as a young man determined to solve an unspeakable crime and absolve the people he loves, while looking for answers within his fractured family and community.

Jimmy Savile was one of the United Kingdom’s most beloved TV personalities. Shortly after his death in 2011, an investigation prompted more than 450 horrific allegations of sexual assault and abuse, with victims as young as 5.

This documentary series explores the 1960 brutal murders of three women in Starved Rock State Park in LaSalle County, Illinois, and the decades of questions and doubts that have haunted the son of the prosecutor in the case, as the man found guilty seeks to clear his name after sixty years in prison.