Hard science, cutting-edge technology and eyewitness testimony are the linchpins of this hit series that investigates the truths behind worldwide animal mysteries such as killer jellyfish and the giant flying monsters of Papua New Guinea. Included in this season’s profiles are "Nessie," which one expert believes he has located with sonar of Loch Ness's floor; a dinosaur in Cameroon; and rampaging apes descended from circus chimps in Florida.