Reptile expert Brady Barr plunges to frigid ocean depths to get close up to one of the world's most mysterious, deep-sea sharks- the giant sixgill shark. These prehistoric creatures have remained elusive despite their size, but while filming some of the largest congregations of sharks ever seen, Barr and his team make an amazing observation and capture unique shark behavior on film.

Reptile expert Brady Barr approaches seven of the world's most dangerous snakes to determine the deadliest. Grading the snakes using basic criteria of size, poison, personality, and number of human deaths, Barr names some of the deadliest of them all.

Reptile expert Brady Barr goes in search of the biggest wild crocodile he can find. Testing out a specially designed laser device with a built-in HD camera, Barr sets out to accurately size up these enormous and dangerous animals.

Reptile expert Brady Barr tracks the Komodo dragon. Studying a 150 pound predator, with razor sharp teeth and the ability to consume up to 80 percent of its body weight in a single meal, is dangerous business- and Barr is ready for the challenge.

Brady Barr sets out to map the dens and lairs of some of the world's most deadly animals: Chinese alligators, American black bears, snakes in South Africa and sharks off Maui's coast.

During a research expedition to Indonesia, reptile expert Brady Barr is bitten repeatedly by a python and wrapped in its powerful coils. Witness this dangerous encounter and find out why the enormous snake attacked.