First-person descriptions of near-fatal bites and stings are recounted in the opener.

The bites of great-white sharks and grizzly bears are examined.

Examining extreme bites, including wounds inflicted by snakes and mountain lions.

Backyard creatures attack.

People who have been bitten by animals, such as tigers, snakes and even an elephant, share their experiences.

A tiger shark crashes a wedding, a normally harmless snake delivers a potentially deadly bite and a beloved family pet turns on a woman.