As the aliens and their mutation allies attack Earth, H.E.A.T. escapes captivity. They battle to defeat the alien onslaught and free the mutations from their control to help humanity fight back and save the planet from conquest.

Acting on confidential information from Phillipe, H.E.A.T. investigate an abandoned lab in the Amazon rain forest where, 50 years before, French scientists succeeded in creating a creature made of pure DNA.

With Godzilla seemingly dead, the team journey to Jamaica to help the U.S. military investigate the ongoing disappearances in Jamaica.

From their secret base on Isle del Diablo, the aliens assemble their forces; H.E.A.T. desperately fights to resist.

A trip to Japan to investigate a number of mysterious disappearances leads to a battle of wills between H.E.A.T. and the Japanese military, who perceive Godzilla to be a threat.

H.E.A.T. investigates the tropical island of Santa Marta in the wake of a devastating volcanic eruption. But what they find on the island is that, due to irradiated lava, a hideously mutated ecosystem has developed, including carnivorous plants and gigantic bees.

When a strange electrical creature known as the Crackler attacks seemingly random locations in Manhattan, the team investigate.

Giant mutated hummingbirds are attacking planes and other aircrafts in San Francisco, but they can flap their wings so fast, they become invisible to human and Godzilla's eyes.

While scouring the sewers of New York, Nick Tatopoulos discovers one of Godzilla's eggs has survived.

While Craven is laid up sick back at H.E.A.T. headquarters, Nick, Randy, Elsie and Monique assist Godzilla in a battle with a Mutant Jellyfish. The Heat-Seeker is engulfed by a mysterious storm which propels the team into a bleak, post-apocalyptic future where Godzilla is dead and the world is dominated by genetically engineered, 5-legged mutations known as Dragmas.

When villages in Mexico are attacked by a strange winged creature, ornithologist and Elsie's old fiancé Lawrence Cohen calls H.E.A.T. for help.

A giant mutant that creates fire around itself attacks an oil rig in the Gulf of Mexico.

H.E.A.T. investigates a gigantic caterpillar-like mutation known as the Megapede, who is rampaging through the neighbor states of Illinois and Indiana. Godzilla is called upon to render assistance, but the Megapede sprays a form of poisonous foam, and also has poison producing spurs along its many legs, both of which serve to keep the Kaiju King at bay. The mega-insect finally climbs atop a building, forms a cocoon, and transforms into a huge winged insectoid creature with the habit of disrupting radar frequencies by rubbing its wings together, thus wreaking much havoc. H.E.A.T. concocts a poison neutralizing foam, which it spreads on the kaiju's wings, allowing Godzilla to attack and defeat the creature more easily.

Cameron Winter returns to take yet another shot at H.E.A.T. and Godzilla, this time enlisting the aid of the three redneck, would-be-killers of the Big G from the previous episode ""Cat and Mouse,"" and equipping them with powerful machines of destruction (sometimes referred to as 'Battle Mechs'--another thank you to Doc Psy from Centropoholics:). Godzilla, H.E.A.T., and a military unit commanded by Major Hicks battle the machines and destroy them, and the three violent hicks are arrested.

The team are called to help a rescue mission for xenobiologist Alexander Preloran, who disappeared while on a mission to explore the Leviathan, an alien spacecraft buried at the bottom of the Pacific Ocean for 65 million years.

In Miami, Godzilla, H.E.A.T., and Major Hicks battle Skeetera, a mutated bloodsucking mosquito-like insect who adapts the powers of the creatures she feeds on. As they attempt to contain the creature they are interrupted by the mutation rights fringe group known as S.C.A.L.E. (Servants of Creatures Arriving Late to Earth).

A traveling carnival arrives at Madison Square Garden, and it's run by a crooked ringmaster known as Theodore P. Bunkum, who specializes in putting various captured mutations on display for public amusement. Bunkum places a hefty bounty on Godzilla, determined to add this most famous mutation to his carnival side show, and this incites H.E.A.T. to attend one of his shows, where they are quickly appalled by his treatment of the various mutations featured in it.

Godzilla is throwing infantile tantrums and H.E.A.T. are growing worried about their ability to control him.

H.E.A.T. are dispatched to aid investigation into the disappearance of a search party looking for oil in Antarctica.

H.E.A.T. is charged by the Pentagon to investigate the growing population of spiders near an Army base in the Canary Islands.

The Techno-Sentient, an alien piece of technology, falls to Earth and begins to bond with all manner of human technology, growing to gargantuan proportions.

While on a romantic cruise in Alaska, Nick and Audrey’s ship is attacked by a Giant Turtle.