Joe Azzouggagh & his German Shepherd, Ace, are deep in the Ontario wilderness when a black bear charges them. Single dad Andrew Dickehage is forced to walk 6 miles along a rural road at night, where he's attacked by unseen predators.

Diver Tim Saxon is filming underwater at the Great Barrier Reef when an Irukandji jellyfish, one of the most venomous animals, stings him. Forester George Knoll is working in the Great Bear Rainforest when a grizzly bear attacks.

Erin Greene is walking home from a Halloween party in a small arctic town when a polar bear chases her down. Triathlete Chuck Anderson is swimming in the Gulf of Mexico when a bull shark attacks, biting his arm & pulling him down.

Taxidermist Wilf Lloyd is elk hunting with his son-in-law in the Canadian Rocky Mountains when a grizzly bear charges. Spearfisher Anthony Segrich is miles from shore, diving 180 feet below the surface when a bull shark races at him.

Jim Lane is picking blueberries alone in the Blue Ridge Mountains when a rattlesnake strikes. Teacher Rachael Lilienthal is swimming in a Florida river when an alligator bites down on her arm & doesn't let go.

Andrea Schlake is volunteering at an animal sanctuary when a chimpanzee escapes its enclosure and chases her down. Surfer Todd Endris is ready to catch a wave when a great white shark knocks him off his board and attacks him.