Documentary
Lucky Number addresses the world of compulsive gamblers. Topics include who these individuals are, what drives them to gamble, the consequences of compulsive gambling, and treatments available to them. Interviews with gamblers, various experts (such as professors), and major…

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One of the world’s greatest ancient enigmas, the Nazca lines are a dense network of criss-crossing lines, geometric shapes, and animal figures etched across 200 square miles of Peruvian desert. Who created them and why? Ever since they were discovered in the 1920s, scholars and enthusiasts have raised countless theories about their purpose. Now, archaeologists have discovered hundreds of long-hidden lines and figures as well as evidence of ancient rituals, offering new clues to the origins and motivations behind the giant desert symbols.

NOVA: Extreme Animal Weapons From lobster claws and dog teeth to bee stings and snake fangs, every creature depends on a weapon. But some are armed to extremes that make no practical sense - whether it's bull elks with giant 40-pound antler racks or tiny rhinoceros beetles with horns bigger than their body. What explains giant tusks, horns and claws that can slow an animal down and even impair health and nutrition? Showcasing astonishing wildlife cinematography, Extreme Animal Weapons investigates the riddle of outsize weaponry and uncovers a bold new theory about what triggers an animal arms race. In creatures as varied as dung beetles and saber-toothed tigers, shrimp and elephants, the same hidden factors trigger the race and, once started, these arms races unfold in exactly the same pattern. In this enthralling special, NOVA cracks the secret biological code that underlies nature's battleground.

Beauty on the Wing: Life Story of the Monarch Butterfly is a 56-minute narrated film that unfolds along the shores of Cape Ann and in the heart of Mexico’s forested volcanic mountains. Every stage of the butterfly’s life cycle is experienced in vibrant close-up, from mating to egg to caterpillar to adult, and set against the backdrop of sea and forest, sun and wind.

Known only by her research number, Grizzly 399 has been a fixture in Grand Teton National Park since 2007, becoming the world's most famous grizzly bear. Now 399 is raising four cubs in the face of human encroachment, a warming climate, and the threat of losing protection under the Endangered Species Act as citizens from Wyoming, Idaho, and Montana attempt to remove grizzlies from the protected list. In a riveting story full of twists and turns, hope and heartbreak, Grizzly 399 stands as a symbol of the clash between humans and the wild.

Sports betting in the USA is booming and this doc features those who know how it all began, up to how it became the huge business it is today. Narrated by Trip Mitchell, insight is provided by baseball's Pete Rose, oddsmaker Dennis Tobler, Pinnacle's Jessica Davis, historians Richard Davies & Eugene Moehring, Buzz Daly, Frank Cullotta, Joe D'Amico, Jim Bobbera, Norm Kelley and "Vegas Dave" Oancea.

Martin Sheen hosts this documentary that commemorates the 200th anniversary of the White House by taking an in-depth look at the beloved piece of American architecture and history and examining artifacts from various presidents. Letters, memos and journal entries bring to light the inside details of the good, the bad and the ugly that's taken place within the White House's great halls over the past 200 years.