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.