Kate Kestrel wins the world song contest and goes on to compete in the interstellar song contest. Zelda contends that as a resident of Earth's solar system she has a right to participate too, and challenges Kate to a sing-off on a neutral planetoid with her family and Sram as her band.

Zelda and the Terrahawks team up to stop Zyklon, a gigantic spaceship dedicated to destroying all life in the universe.

While pursuing a ZEAF, Hawkwing flies too high and is marooned in space.

Zelda dispatches Yung-star and a new monster, Lord Tempo, to find the location of Hawknest. While traveling back in time to avoid Spacehawk, they pick up King Richard.

When the Terrahawks are rendered catatonic by space flowers, Zero is forced to battle for the cure on his own.

Zelda enjoins the help of Cold Finger, an alien who uses water and ice as weapons.

An overzealous general seizes control of the Terrahawks to mount a direct assault on Zelda's Mars base. Ninestein makes futile attempts to warn him that Zelda and her gang of monsters are too powerful to engage in direct combat. Zelda readies a counter-strike team of Sram, Yuri, Lord Tempo and Yung-star.

Lord Tempo creates a time warp in order to slow down the Terrahawks' ability to react to a full-scale attack.

Moid, Master of Infinite Disguise, transforms himself into the Invisible Man to create trouble for the Terrahawks

Yuri seals Battlehawk inside Hawknest after Battletank picks up a bomb while investigating a ZEAF.

Stew Dapples becomes the eyewitness to Zelda's latest plot when he sees a UFO.

Zelda sends a huge egg to the moon that hatches into a one-eyed monster.

A statue of Yung-star is found at a museum on Earth.

It-star masterminds its first attack, attempting to destroy the Terrahawks with a bomb.

Zelda defrosts one of her monsters, Sram, who unleashes his devastating voice against the Terrahawks.

An old space probe approaches Earth, but the Terrahawks worry because it was never meant to return.

Zero and Dix-Huit roll to the rescue after Kate and Stu are kidnapped by Yung-Star and Yuri.

The aliens are preoccupied with the birth of Cy-star's child while the Terrahawks prepare to launch a sneak attack.

The Zeroids find an explosive meteorite, which the human Terrahawks mistake for gold and which Zero mistakes for the god that Ninestein worships; it kills one of Ninestein's clones when it explodes, forcing another to take his place.

Zelda attacks NASA's outpost on Mars and establishes her home, then mounts an attack on Earth, forcing the Terrahawks into battle

The Terrahawks pick up a capsule in space containing only a strange vapour. However, it actually contains a gaseous monster that meddles with their minds.

Zelda lures Ninestein with the captured two-man crew of a commercial space transporter. When the Terrahawks electronically isolate themselves from after rescuing the men, Kate has to inform Ninestein that the mission to get him back is ahead of schedule.

A pair of miners find and capture a Sporilla and take it back to Earth to sell to a shady sideshow owner. Once it is on Earth, Zelda uses her powers to enlarge the monster into an unstoppable giant.

Zelda lures the Terrahawks to Jupiter's moon Callisto by ransacking a listening post there. Once they arrive, they find themselves being stalked by the fearsome Sporilla.

The Terrahawks struggle to defend against the aliens' strange powers, and find they may be forced to stop the attack at the cost of Ninestein's life.