The Foreign Legion: Tougher Than the Rest

When Lori Vallow's kids vanished, the search for them unearthed a trail of suspicious deaths, a new husband who shared her doomsday views — and murder.

A historical exploration about the eruption of Vesuvius in 79 A.D. and the preserved Roman city it left behind.

A kaleidoscopic portrait told in two parts tracing the life of the imaginative artist.

David Attenborough uses pioneering 3D-techniques and technology to explore the unique environments and species of the Galapagos.

Take a trip inside the mind of Bill Gates as the billionaire opens up about those who influenced him and the audacious goals he's still pursuing.

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

In 1991, four teenage girls were brutally murdered at a frozen yogurt shop in Austin, Texas. What happened that night forever shook the Austin community and continues to mystify the police and haunt the families left in the wake of unthinkable loss.

In official collaboration with the 9/11 Memorial & Museum, this documentary series takes viewers through harrowing moments of the historic morning of September 11, 2001.