Casey Anderson searches Alaska for proof of a beast called the Mega Bear.

Casey Anderson heads to Mexico to find out if vampire bats are attacking humans; visiting caves and cattle ranches, he hunts for a mega-colony of bloodsuckers and puts his safety at risk.

When national parks report man-eating tigers attacking local villagers, Casey Anderson heads to Nepal to lead a search for rogue cats; traveling by elephant, raft and on foot, Casey moves into the killing zone to track the man-killers.

Following reports that a renegade giant crocodile named Bizmark is terrorizing the Zambezi River, Casey Anderson heads to Zimbabwe and Zambia to launch an investigation; Casey goes into a custom-built cage to try and trap the fierce reptile.

Spurred by reports that an extinct predator may still be alive, Casey Anderson heads to Australia to investigate possible sightings of a marsupial lion; as Casey heads deep into the wilderness, he finds that the evidence points to another mystery.

Spurred by reports of a massive snake attacking people in Colombia's Amazon basin region, Casey Anderson travels to Bogota to begin an investigation; he discovers a possible link between a prehistoric megasnake and the present-day anaconda.

Casey Anderson heads to Mozambique to track down a rogue elephant that's been terrorizing villagers; he meets with an elephant behavior expert to determine what's behind the animal's rage and uncovers a vital clue to identifying the aggressive bull.

Casey Anderson travels to Bolivia to investigate sightings of a giant mammal that resembles the long-extinct ground sloth; locals may have much to fear if the mega sloth has escaped extinction and emerged from the Amazon basin.

Casey Anderson heads to the backwoods of Texas and Louisiana to hunt for a gigantic wild hog.