Hiking in the Montana mountains, trail engineer Todd Orr is attacked twice by grizzly bear protecting her cubs. And, during a vacation in the Bahamas, Tiffany Johnson is snorkeling when she finds herself face to face with a tiger shark

Micki Glenn is attacked by a shark during a dive trip. Hours from the nearest medical facility, she has to rely on her husband and friends to save her life. And, a couple celebrating their wedding anniversary are attacked by a giraffe while on safari.

Paul Templer is leading a canoe safari on the Zambezi River near Victoria Falls when a hippopotamus bursts to the surface and drags him into the water; in Texas, an animal pounces on 5-year-old Jade DeMoss.

Wayne Petteway is attacked by an alligator while checking crab pots with his brother in North Carolina; in Arizona, Peter Baca is camping with his girlfriend and baby son when he is awoken by something attacking him through the walls of the tent.

Nicole Moore's vacation in Cancun, Mexico is cut short when she is attacked by a shark close to shore. In Tennessee, firefighter Kyle Watson and his family are hiking in the woods when he is bitten by a timber rattlesnake.

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Allena Hansen is working on her ranch in the California desert with her two rescue dogs when she is attacked by a black bear. And in Cancun, Mexico, Jonathan Schoeneman is spearfishing with his best friend when he comes face to face with a crocodile.

Catherine Dwinnell is hiking in Alaska when she is struck from behind and attacked by a 1,000 pound moose. In Hawaii, Tony Lee is swimming a half mile from shore when something grabs him and drags him below the surface.

Professional climber Greg Boswell is high up an ice-covered Canadian mountain in the middle of the night when he is charged by a grizzly bear. And in Upstate New York, a retired nurse is attacked by a rabid coyote.

Colorado park ranger Andy Peterson is hiking when he crosses paths with a mountain lion and its prey; in Vancouver, Kari Toft is walking her dog just steps from her home when she is attacked by a vicious raccoon.

Twenty miles into a marathon in a remote part of New Mexico, Karen Williams finds herself caught between a bear and her cub; Steve Campbell is working on an oil pipeline in Alberta, Canada, when a mountain lion attacks him.

On Christmas Eve, Matt Chenhall is walking with his two young daughters when he is attacked by a kangaroo; Lauren Fagen is volunteering at an animal sanctuary in South Africa when a lion reaches under a gate and pulls her legs through the bars.

A bull shark attacks a triathlete who is training in Alabama; a father fights to survive after a rattlesnake bites him; a giraffe attacks a couple in Zambia; a girls' trip turns deadly in Cancun.