On this mission, we help a tiny seal pup find her missing mommy. We also investigate the legend of a giant pig monster named Hogzilla; visit a real dog with the nose of a seasoned detective; explore many types of octopuses and discover why a dung beetle needs to make a clean getaway with a load of, well, ... dung.
On this mission, we dive with the largest animals that have ever lived - Blue Whales - in a ploy to crack the secret code they use to communicate. We also solve the mystery of why Rio the parrot suddenly has a change of heart; track a group of Snow Monkeys that relocated to Texas; investigate the many species of owls and visit a detective who invites a pair of River Otters to live in his house!
On this mission, we spy on a shocked tiger in his bathtub. We also catch a crab-filching octopus red handed (all eight of them); discover what's causing killer whales to jump out of the water; monitor a gang of mischievous crows and investigate some experts in the art of camouflage - tropical frogs.
On this mission, we discover the secrets of a secretive bear society in Alaska. We also discover the truth behind a mystical creature of the Arctic ice; trail-blaze through the swamps of Arkansas searching for a giant Anaconda; meet a detective who swims with Great White Sharks and spy on the covert world of fire ants.
On this mission, we discover why Humpback Whales blow bubbles when they eat. We also investigate some acrobatic cats; eavesdrop on the long distance calls of elephants; test 'Crittercam' on the inventor's little boy and investigate a very loyal species - the dog.
On this mission, we figure out how some giant sea turtles cleverly avoid becoming shark bait. We also discover why woodpeckers hide thousands of acorns; run a gang of mischievous monkeys out of town; deploy some cool thermal cameras to see what really happens in pitch-black caves; and investigate an oddly-toed creature called a Tapir.
On this mission, we discover why Monk Seals in Hawaii like to go around flipping rocks. We also conduct covert surveillance on a town invaded by a huge flock of crows; crack the secret code of some very vocal meerkats; spy on clever dolphin antics; and investigate a species close to our hearts - cats.
On this mission, we travel to Yosemite for an undercover mission to investigate black bears accused of stealing human food. We also deploy special cameras that reveal how owls see in the dark; discover the secrets of animal-made islands in the rain forest; meet a detective who searches for snakes with his bare feet; and investigate the relatives of killer whales.
On this mission, we put Layla the lioness under surveillance to see what the cubs in her pride are up to. We uncover the truth behind a missing plague of locusts; catch some dumpster-diving polar bears in the act; investigate a real live monster and go under the cover of darkness to discover what's up with bats.
On this special mission, we put a spy-camera on Rodney the penguin to figure out why he dives out of sight. We also discover the truth about some penguins' arch enemy - the carnivorous leopard seal. In between these major mysteries, we travel to National Geographic headquarters in Washington DC to meet our chief spy and his crack team of real-life inventors.