A comet is sending out artificial signals, and the Centurions are sent to check it out. When it turns out to be hollow, they beam inside. Within, it seem barren... at least at first. But then, as the comet's true nature is discovered, a new danger emerges from the shadows, a feline creature with the ability to drain anything power-generated, including the Centurions' weapon systems... The trio attempt to evade the beast by beaming to Skyvault, but the alien hitches a ride, and begins a chain of events which could end in Skyvault falling earthwards! Unless the Centurions can think of a way to cage this animal, it will sink its teeth into the best meal he's ever had: Earth's energy resources!

Science Lesson: Halley's Comet by Ace.

Ace is on the Moon, inspecting the security systems of a mass-driver ore transporter, that ships mined ore from the Moon to the Earth. It soon comes under attack by Terror's Strafers under the command of the cyborg Lunex. Ace is unsuccessful in defending the mining-camp, and both he and it are captured by Lunex. Doc Terror then announces that he will use the mass-driver to launch meteors at the Earth. Ace is rescued, and together, the Centurions beam-over to Lunar free it from Lunex. However, the meteor has already been launched toward the San Andreas fault line, and only Ace alone can stop it.

Science Lesson: The Moon by Crystal.

Randy Chang, the young champion of the Holo-Games, is kidnapped by Doc Terror, who plans to use his strategic knowledge to defeat the Centurions. Terror disguises himself as the ""Gaming Master"" and tricks Randy into thinking that his attacks on the Centurions are merely parts of a game. The Centurions manage to get to Randy, but Terror turns him into Multi-Borg, a cyborg that can split into three parts. The Centurions have to stop Multi-Borg before Randy fully turns into a cyborg.

Science Lesson: Niagara Falls by Crystal.

A mad geneticist, Dr. Yates, attempts to create a lizard army, but is thwarted by the Centurions. However, during their struggle he accidentally injects himself with lizard serum and becomes a human chameleon, able to change form at will. He vows revenge on the Centurions, currently vacationing in Monte Carlo. The Centurions are not easily beaten, but when the enemy could be one of them, can even they win?

Science Lesson: Chameleons by Jake.

In the Amazon, Dr. Jose Rivera, the South American representative of the World Council of Scientists, is held for ransom by Colonel Guerrero. Jake is sent to deliver the ransom, but is captured by the Colonel. As the Colonel prepares to ship off Rivera to Doc Terror, Jake escapes, and with the assistance of Ace, attempts to stop Guerrero in his tracks.

Science Lesson: Amazon rainforest by Max.