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. However, the real threat is revealed to be anophidiaphobic's nightmare: the mutant King Cobra has escaped from Monster Island. Things lead to a climactic showdown in Tokyo between him and Godzilla.

H.E.A.T. are dispatched to aid investigation into the disappearance of a search party looking for oil in Antarctica. The team must now not only battle against the monsters responsible — a pack of mutant "Ice Borers" — but also against the energy company who employed the men, who are determined to brush all record of the incident under the rug.

Godzilla is throwing infantile tantrums and H.E.A.T. are growing worried about their ability to control him. When Audrey lets this slip on live TV, despite being told in confidence by Nick, their relationship looks set to be torn apart. Meanwhile, when called in to investigate extensive deforestation in the Amazon Rainforest, they discover that a mutated termite colony is devouring the forest at an alarming rate. H.E.A.T. must find a way to destroy the voracious bugs before they devour the entire rainforest.