The black mamba is one of Africa's most dangerous and feared snakes. Watch the full episode now.

Thea and Clifton respond to a call from a maid who spotted a six-and-a-half-foot black mamba inside a guestroom at a resort they manage.

The black mamba is Africa’s deadliest snake. In Swaziland, snake handler Thea Litschka-Koen and her husband, Clifton, endeavor to change attitudes and save lives.

View photos of Thea Litschka-Koen and her husband, Clifton, as they try to save lives and change attitudes about the black mamba, Africa's deadliest snake.

Meet the reptile-chasers and scientists who are researching the venom cure. Watch the full episode online.

Bryan Fry's goal is to collect, study, and catalog the chemical characteristics of venom from sea snakes.

Frank Markland discusses his research into whether contortrostatin, a protein found in copperhead snake venom, is effective in attacking cancer cells in breast cancer patients.

A textile cone hunts other snails. Its proboscis contains a harpoon, loaded with a powerful venom called conotoxin. It paralyzes its prey so it can be sucked from its shell and devoured.

Could a spray made from the clotting agent in a snake's venom be used to prevent people from bleeding to death after an accident?

(Airs Sunday, June 6) Scientists have discovered that natural poisons and venoms contain chemicals that can be used to create drugs for treating everything from chronic pain to cancer.