Episodes

• Invisible Enemy

  +

  In Orewa Beach, New Zealand, summer swimmers are suddenly attacked by an invisible enemy. They rush out of the water with a stinging, blistering rash. Marine scientists and doctors are baffled. What could be causing such a violent reaction?

• Fight Or Flight

  +

  In Minnesota, blue herons are fleeing their nests in droves. Locals - who have made the bird their town logo - are devastated. What could be scaring these birds away?

• Crocodile Wipeout

  +

  Large numbers of freshwater crocodiles are turning up dead in the Victoria River district in Australia's Northern Territory. The mystery draws an investigator all the way from Sydney to look into what could be killing these crocodiles.

• The Elk Files

  +

  Big, strong elk are dropping down dead or are left parlayzed in the wild Wyoming countryside by the hundreds. The only clue in this distressing mystery is orange blobs of urine on the ground. Could the strange color of the urine point to the cause of the elks' death and illness?