In search of energy now that planet Cybertron has finally been drained, the Autobots must leave Cybertron and venture to other worlds in search for energy, but to make matters worse, they are also pursued by the Decepticons, who are also seeking energy themselves if they are to win the war against the Autobots.
The Decepticons continue raiding Earth's energy sources, including Sherman Dam and the Ruby Crystal Mines of Burma.
When an Autobot attempt to lure the Decepticons into a holographic trap fails, the villains succeed in gathering the energy the need, leaving the Autobots with only one chance to stop them returning to Cybertron.
The Autobots create the Dinobots, but can barely control these new powerful warriors.
Megatron challenges Optimus Prime to a one on one battle to end the war.
When the Autobots perform a race for charity, the Decepticons take the opportunity to trap them in their vehicle modes.
Megatron tries to drill his way to the center to the Earth, while the Autobots harass Devastator with mind-controlling Dominator Discs.
The Dinobots are sent to a mysterious, prehistoric island for training. But the Decepticons intend to plunder its energy resources.
The Decepticons' plundering of Dinobot Island's resources cause instabilities in the timestream.
Grapple and Hoist ally themselves with the Constructicons.
The Transformers go to the sixth century but avoid Camelot, as it is a silly place.
Beachcomber finds a stream of golden liquid that renders his hand invulnerable. Unfortunately, the Decepticons do too, and decide to take a dip.
The big-game hunter Lord Chumley begins hunting Autobots, and he's gunning for Optimus Prime.
Snarl and Swoop are added to the Dinobot roster... and just in time!
The Decepticons ally with the undersea realm of Sub-Atlantica. But they may be more treacherous than Megatron expected.
After having his logic circuits damaged in battle, Red Alert feels rejected by the Autobots and allies himself with Starscream.
An electric pest annoys everyone. Including the viewers.
Astrotrain and Blitzwing depose Megatron and Starscream, then proceed to wreak havoc.
After his latest attempt to overthrow Megatron's rule of the Decepticons, Starscream is banished from HQ, but this time, he hatches a plan...
Even though Starscream and the Combaticons are banished to space, they are still a threat—a threat returning to destroy both the Decepticons and the Autobots...
After defeating the Stunticons, five of the Autobots pose as the crazed combiners to learn of Megatron's newest plan.
Set on regaining a physical body, the ghost of Starscream possesses Scourge and makes a deal with the devil.
While Galvatron threatens the Autobots with a vague and mysterious "ultimate weapon", First Aid leaves the Autobots.
The Decepticons conquer Paradron, a world inhabited by pacifistic Autobots.
After months in hiding, the Decepticons return and have a new method for moving Energon cubes to Cybertron.
The Decepticons seek a powerful antimatter formula, and the Autobots with their new human ally Chip Chase try to stop them.
In a plot to drain the sun for power, the Decepticons capture and alter the grumpy Autobot Gears.
After a surprise attack (read: diversion) by the Decepticons, the Autobots repair themselves in their regeneration chambers, only to emerge...EVIL!
Megatron's latest scheme involves using the most powerful computer on Earth to control machinery remotely.
The Decepticons get a hold of the Nightbird, a deadly ninja she-bot.
Megatron creates a clone of Optimus Prime to lure the Autobots to their doom.
The Insecticons feed on a source of power which causes them to grow... and will cause them to explode if not cured.
Perceptor, Brawn, and Bumblebee must shrink themselves to go inside Megatron and retrieve an artifact, the Heart of Cybertron, that gives him enormous power.
The Decepticons hijack Earth's airwaves. Yet somehow, you are still able to watch this episode.
Seaspray turns into a merman with robot feet and falls in love. What?!
Discovering that his long-thought-dead love, Elita One, is in the hands of the Decepticons, Optimus Prime speeds to Cybertron on a rescue mission, only to end up discovering something about his own history in the process.
A wounded Spike is turned into an Autobot Frankenstein's monster to save his life.
A newly-orphaned debutante must protect her late father's work from Megatron. She finds Powerglide, and with him, safety...or perhaps...something...more?
With the Dinobots having deserted the dying Autobots, Spike and Carly must find them and save the Autobots.
Megatron brings Cybertron into Earth orbit to harvest the energy from the destruction caused by Cybertron's gravity.
Cybertron's arrival causes disasters on Earth, leaving the Autobots to battle both the Decepticons and Nature.
As Cybertron's orbit ravages Earth, the Autobots take the fight to the Decepticons.
After Swindle sells the components of his fellow Combaticons, three kids get their hands on Brawl's brain, using it to make a robot.
Slingshot and Skydive go undercover to discover who is responsible for the theft of planes in the Middle East.
After finding a new weapon, Megatron becomes infected with a strange disease — one he intends to use against the Autobots.
In the war with the Autobots, the Decepticons change tactics, turning the humans against the Autobots.
Having had the Autobots exiled from Earth, Megatron reveals the Decepticons' true intentions.
The Decepticons uncover the Crystal of Power in Peru, and the Autobots resurrect Skyfire to stop them.
In the aftermath of Cybertron's catastrophic orbit of Earth, Starscream seizes control of the Decepticons and puts into motion a plan to destroy the planet.
In a plot to obtain a Cybertronian weather-controlling device, the Decepticons stage a fake race across Europe.
The Decepticons invade New York City.