Chris and Martin are determined to prove to Aviva that there's more to crocodiles than their reputation as scary brutes. They use an egg disguise, created by the young inventor, to infiltrate a crocodile nest for an insider's look at the challenging journey of the infant crocs. They also discover the importance of heat in the life cycle of the croc and that heat can even move from one object to another by a process called conduction.

Aviva's sub prototype gets sucked into a battle between a sperm whale and giant squid.

After a young aardvark accidentally becomes a stowaway in Chris's backpack, the Wild Kratts team sets off on a “door to door” search to return him to his home burrow. Along the way, they discover how aardvarks manipulate earth materials to alter landscapes and learn the incredible (and valuable) service this amazing animal provides to all the burrow-living creatures of Africa.

Martin and Chris find out that a fashion designer is capturing Draco lizards for part of her new fall collection.

Aviva miniaturizes Chris and Martin for a fascinating underground mission to meet earthworms and dig up the answer to the mystery of why worms come above ground when it rains. But they have to hurry, as they soon realize that life as a worm is full of dangers at every turn. Along the way they learn that wet objects can be changed by heating and cooling and that the worm’s unique environment helps them stay moist.

While kayaking in Australia, Martin and Chris encounter one of the world's most unusual creatures, a platypus mother with her eggs. But unscrupulous endangered animal chef, Gourmand, plans on making the platypus eggs his next delicacy. The Wild Kratts team must use the special "sixth sense" of the platypus to save the eggs. Science Concept: Organisms use their senses to find out about their surroundings and themselves. Different senses give different information. Platypus have a special electromagnetic sense that detects objects, like food.