The Rangers are sent to rid an asteroid belt of giant space whales. But they end up in the middle of a fight between "SpacePeace" and a madman, consumed with a vengeful desire to destroy the whales forever.

The Kiwis and Andorians, on their way back from a Federation Conference, discover The Orion Flying Circus and Rodeo Show, led by Wild Bill Krebb, and have no idea they are meant to be part of the act.

While introducing Kiwi marshmallow trees to the planet Grana, the planet's two suns have an adverse effect on the trees, making them complete their entire cycle of growth in one night, not to mention being 100 times their normal size. The planet will be overrun by the trees if a special breed of locusts aren't used to destroy the crop. Unfortunately, the residents of Grana don't think the locusts are a good idea at all. It turns into a free for all, as everyone commandeers everyone else's vehicle trying to stop the Rangers from releasing the locusts.

Roy and Burro are back, this time on Shaky, a planet with much seismic activity, but possibly a big starstone deposit, and the Black Hole Gang wants the claim.

Old Roy the prospector uncovers an ancient civilization, so Niko and Doc are called in and wind up battling an ancient android programmed to protect the city.

The Rangers are leading a strike team against the Black Hole Gang at Entropy's Edge, a black hole or wormhole of some sort. During the battle Goose, after knocking out the power source of the Black Hole hideout, is dragged into the black hole. His charge goes nuts and finally he gets spit out at the other end of the wormhole into the Empty Zone. He crashes on Ozark and wakes, unable to control his morphing. Drawn by Annie Oh's cries for help as she is attacked by a Dinosaur and Goose morphs into a monster in order to save her. Annie tries to shield him from the people of Ozark, who have no tolerance for off-worlders, until the other Rangers track him down.

MaCross wants to own the Texacota valley, because it has oil fields, and decides the best way to go about this is to re-enact a Godzilla movie, using the giant sleeping Bronto Bear, and substituting Texacota for Tokyo. The bear, decidedly unhappy about having its winter hibernation disturbed is on a direct course to the city, and it's up to the rangers to give the big lug a sedative and get it back to the Arctic where it belongs while the law enforcement in Texacota handle crowd control.

An investigation leads to a Round Up.

Lazarus Slade and Mogul combine their forces to create a badge that will duplicate all of the Rangers' unique gifts, stealing the data needed from the BETA computers.

Daisy O'Mega and Maya of Tarkon team up to buy weapons on Mesa to outfit the Tarkonian rebels, and discover someone is arming the natives, and it will turn into an all-out range war if the Rangers can't stop them.

An artificial planetoid is detected on a collision course with Earth. The Rangers and the ambassadors head out to try to stop it and find a heavily armed station that is completely empty - empty that is except for the ghosts of the civilization that built it!

Doc and Niko are sent to Maya's homeworld Tarkon, to prevent a treaty between King Spartos, Maya's father and the Queen of the Crown. In the midst of all this, the mystery of the Heart, a giant computer hidden away in a mountain, is introduced. While Niko investigates the computer with the help of an ancient Shaman, Doc gets to play dress up and even use those fencing lessons he took at Miss Abercrombie's charm school.

Zach and Zozo are sent to planet Biste-Fenokee to check up on Audra Miles, an anthropologist studying an aboriginal species on a world where nature is in complete control and technology doesn't operate properly.

Niko, Doc and Buzz take Zozo, Zach Jr. and the Kiwi kids on a field trip to Mistwalker's home world, and find out the supposedly perfect natural balance has been tipped by Slade.

The Queen launches a special psychocrystal through hyperspace. It manages to get on board a new ship of the navy that the Rangers happen to be taking on its maiden voyage tour of the solar system. The crystal takes over Zach's arm, and uses his lifeforce to power itself as it constructs a body out of servo droids. The Rangers have to stop it before it kills Zach.

Old Roy McIntyre's at it again! The prospector and Burr-O 5000 are on C-40, yet another planet in his never-ending search for the mother lode. Using his high-tech divining rod and his space-pick, he strikes it rich, uncovering a huge deposit of Starstones. But it isn't long before word spans the galaxy and the "gold rush" is on. Beings from all over the universe come to the planet to stake a claim and get rich. Unfortunately, the rush attracts the wrong element as well, like the Black Hole gang, who jump claims and rob the miners of their valuable Starstones. And Capt. Kidd and Squeege, sensing a chance to make a space-buck, naturally show up as well. He's selling blasters and weapons to the bandits who are running roughshod over the planet. This "boomtown", a rapidly grown city which sprang up around the mines is on the verge of being a lawless hell-hole. Which is why they request the Galaxy Rangers to come to town.

The rogue Supertroopers kidnap Senator Weiner and force him to steal Batch 22, a virus that can destroy all organic life on any planet. They want Gooseman, Dr. Negata and Commander Walsh to meet them at Wolf Den, their old Supertrooper training ground. Long flashback to when Captain Walsh ran the program, how Weiner messed it up and how Gooseman became the man he is today.

Nimrod grabs the Rangers out of hyperspace, and makes them play his version of the most dangerous game, without their badges. They have to make do as normal, human Rangers.

Lazarus Slade has once again teamed up with the Queen of the Crown, and once again they plan an assault on Earth. This time, however, the Queen gives him 500 Plagos for the attack. Plagos lack the good sense God gave sheep. But they might have been successful if they hadn't come up against BETA's brilliant defensive minds. Yes, thanks to an android double of Premier Dutch dispensing knockout gas, Buzzwang, his food dispensing android buddies, the Ambassadors and the Kiwi kids are minding the store, and it's up to them to save the world.

A malevolent spirit is harvested along with the crops on the planet of Grana, and it's up to the Galaxy Rangers Niko and Goose to stop the "Scarecrow" before he sows the community's destruction.

A blond, stubbled man in black appears in Frontier looking for Jacob Laramie, who has hired Stingray as muscle to push ranchers and farmers off their land to use as grazing land for his Bovo 9 cattle. Goose, the man with no name, confronts Stingray and Darkstar.

The Queen has built a cannon that can destroy a planet, and is trying to hold the League hostage with it. The Rangers are sent in to work with the resistance group on the planet and destroy the weapon. The resistance group is led by Wirwar, whose family is held hostage by the Queen and who tries to free them by handing the Rangers to the Queen. Despite that, they succeed in destroying the Queen's weapon but have to escape in a ship which they discover only has five minutes worth of oxygen.

The Queen of the Crown uses her half of the Eliza Foxx psychocrystal to lure Zachary Foxx to her Psychocrypt, a facility in a remote area of space. Zachary is captured and used to create the most power psychocrystal ever. Against orders from Commander Walsh, the rest of the Series 5 team must track down Zach with the help of Geezi the Pedulant and rescue him from the clutches of the Queen.

Lazarus Slade is supplying the General with warriors for his games by kidnapping. He grabbed Doc off an automated space station, and Goose is sent undercover to find out what's going on. Maya has survived the games thus far, and switches sides to help Goose and Doc put Slade and the General out of commission. The General becomes fascinated with Gooseman, believing him to be a metamorph, and the perfect candidate for his cloned army.

Lykans, a highly intelligent wolf-like species, are being blamed for the deaths of Bovo 6 cattle on Prairie. Audra Miles, who has been living with the Lykans, calls on Niko to help her prove the Bovo corporation is at fault, and she and Doc are sent to investigate.