NOVA: Why Trains Crash

Legendary journalist Gay Talese unmasks a motel owner who spied on his guests for decades. But his bombshell story soon becomes a scandal of its own.

Documentary filmmaker Amy Berg investigates the life of 30-year pedophile Father Oliver O'Grady and exposes the corruption inside the Catholic Church that allowed him to abuse countless children. Victims' stories and a disturbing interview with O'Grady offer a view into the troubled mind of the spiritual leader who moved from parish to parish gaining trust ... all the while betraying so many.

Investigators reveal how Boeing’s alleged priority of profit over safety could have contributed to two catastrophic crashes within months of each other.

This documentary brings to life the stories of four people believed by their family and friends to be “DB Cooper,” a man who hijacked a 727 flying out of Seattle and jumped from the plane over the wilds of Washington State with a parachute and $200,000, never to be heard from again.

Police pull over a woman who claims she just gave birth. But the baby — and the blood — aren't hers. Twisted lies unravel in this true-crime documentary.

When Juan Catalan is arrested for a murder he insists he didn't commit, he builds his case for innocence around unexpected raw footage.

Through deeply personal interviews with her siblings and an examination of the photographs, letters, and belongings left behind, Mariska assembles a new portrait of her mother Jayne Mansfield, an extraordinary and complex woman.

A string of threatening emails escalates into a revenge plot involving a newly married US marshal and his ex-girlfriend.

New exclusive access and never before heard testimony gives a unique insight into the mind of America's most notorious serial killer, Ted Bundy. Breathtaking archive from the time and the voice of Bundy himself, reveals the monster inside the man.

Alexander McQueen's rags-to-riches story is a modern-day fairy tale, laced with the gothic. Mirroring the savage beauty, boldness and vivacity of his design, this documentary is an intimate revelation of McQueen's own world, both tortured and inspired, which celebrates a radical and mesmerizing genius of profound influence.

Scientists examine underground clues from over 250,000 years ago that raise questions about our early relatives — and what it truly means to be human.

After 16-year-old Cyntoia Brown is sentenced to life in prison, questions about her past, physiology and the law itself call her guilt into question.