The Ultimate Vampire Resource and Directory

The show was set in Beverly Hills, California. The four central characters of the show were teens selected by a blob-like brain alien named Nimbar to fight off the monsters sent by evil Emperor Gorganus. Gorganus is intent on conquering Earth because it is the focal point for a network of "Power Portals" that would facilitate conquest of the galaxy. In the first episode Nimbar recruits the four high school students and with a touch by his "finger" gives them each a tattoo, based on a constellation in the celestial sphere. When their tattoos flash, this means Nimbar needs them and a power portal appears that they can pass through to enter his chamber. Nimbar is the Head Protector of the Power Portals. As such, he served as a Zordon-like ally.

The teens could then stand atop platforms called "Transo Discs" and transform into "Galactic Sentinels" with super powers. When they put their hands together in an interlocking square they form the ultimate Galactic Sentinel called Knightron.

In one episode, there was a replacement for Laurie when she was injured badly by Predaraptor. He is known as Orion in sentinel mode, his true form. His civilian name was unknown in his duration on Earth. But when Nimbar pronounced his name in an utteration of slurs and gurgles, he stated with a sneer "Just call me Rick." He was played by Kevin Castro, who also played Tanker in the related series Superhuman Samurai Syber-Squad.

They frequently could be seen in a coffee shop owned by Drew's aunt.

One interesting difference between the two shows is that in this show, people noted they were missing. When Drew's aunt confronted her about this and Drew revealed her secret, she brought her to a psychiatrist to help with her "delusions." It also differed from similar shows in that the heroes were not good friends and in that they sometimes had trouble getting along.

The show also featured at least one episode that made a jab at the "monster of the day" convention by showing how tactically unsound the practice is for conquering a planet. Gorganus went on vacation in that episode. His chief henchman Lechner tried to conquer Earth in his absence, and when the monster he sent was about to be destroyed, he recalled it and sent another moments later. The heroes were nearly defeated until the main villain returned and re-implemented the "monster of the day" formula.

It should be noted that the Galactic Sentinels must not reveal their true identity to anyone. In the event that someone happens to follow them through a power portal, they will end up being subjected to the Memory Fader once the monster that Emperor Gorganus sends is defeated.