Jordan Carbery is investigating a noise outside his cabin and encounters a massive grizzly bear; Zanele Fox and her husband take a river tour when she is thrown from her raft and ravaged by a crocodile.

Outside Corpus Christi, Texas, Jeremy Sutcliffe is working in his garden when a rattlesnake bite puts him on the brink of death; while spearfishing in the Bahamas, Kent Bonde is blindsided by a bull shark that tears the calf muscle from his leg.