Its wild, unpredictable and all in a days work. National Geographic goes behind the scenes at the Houston Zoo to see the inner workings that visitors don't see. Episodes include Special Delivery, Operation Ocelot, and Urban Jungle.

Follows the Best Friends team of experts and volunteers as they struggle to treat some of the most ill and neglected animals they've encountered to date, including victims of Hurricane Katrina and a special case from country legend Emmylou Harris' Tennessee animal rescue. Includes 10 episodes.

"Could LSD be the next drug in your doctor's arsenal? New experiments have a few researchers believing that this 'trippy' drug could become a pharmaceutical of the future, thinking it may enhance brain power, expand creativity, and cure disease. Outlawed in 1970, the street drug developed a reputation as the dangerous toy of the counterculture, capable of inspiring either moments of genius, or a descent into madness. Now...take...a fresh look into...

Meet the largest carnivore on Earth: the great Kodiak bear. Travel to Alaska's Kodiak Island where 4,000-foot mountains rise up along hundreds of miles of jagged coastline. Hike these ancient feeding trails where bears as big as 1,500 pounds gorge on berries and roll down salmon-rich rivers past cubs learning to fish. Renowned wildlife filmmaker Wolfgang Bayer even takes you inside a den. Plus, witness dramatic home videos of dangerous tourist encounters...