The Decepticons acquire the Key that will give them access to Vector Sigma. After using Vector Sigma, they find the Key is also capable of making organics turn into machines. Megatron prepares to use it against Earth and The Autobots will need new allies in this battle, but their creation will come at a high price.

The Key to Vector Sigma (1)

Peter Cullen

Frank Welker

Jack Angel

Corey Burton

Don Messick

John Stephenson

Christopher Collins

Dan Gilvezan

Hal Rayle

Casey Kasem

Neil Ross

Ed Gilbert

Scatman Crothers

Victor Caroli

Ken Sansom

Jim Cummings

Gregg Berger

Peter Renaday

David Wise

Terry Lennon

The Key to Vector Sigma (2)

Hoist Goes Hollywood

Spike is severely hurt during a battle. His mind is placed into Sparkplug's recent creation, Autobot X, until his body can be saved by an operation. But the Autobot X body was unstable to begin with and Spike soon ends up betraying his friends.

Autobot Spike

Wheeljack's new invention, the Immobilizer, is capable of rendering any Transformer hit immobile for a short time. Once the Decepticons get their hands on it, however, they modify it and begin leaving many Autobots immobile.

The Immobilizer

Proving to be a danger even to their own allies, the Dinobots are sent away to train on a recently discovered island in the hopes that they will learn how to effectively work together. The island, however, is far from ordinary as it is populated by dinosaurs. Meanwhile, the Decepticons make advances toward the island so they can acquire it's natural resources.

Dinobot Island (1)

The Decepticons' tampering on the island creates openings to other times, allowing all sorts of things from various times to arrive in the present. The Autobots race to reverse this before it's too late and to stop the Decepticon plot. But in the end, their best hope may be the Dinobots.

Dinobot Island (2)

Failing to cause a divide between the Decepticons and Insecticons, Mirage's mind suddenly becomes enslaved and he is used by them in a plot against the Autobots.

Traitor

The Decepticons send the recently stolen Nightbird on a mission to steal an informative chip from the Autobots.

Enter the Nightbird

The Decepticons plans to take energy from the center of the sun using a circuit from one of their enemies, Gears. The Autobots must defeat the Decepticons and rescue their compatriot.

Changing Gears

The latest Decepticon plot to destroy the Autobots involves the creation of a Optimus Prime duplicate. They hope this duplicate will be able to convince the other Autobots he is the genuine article and will lead them into a chasm that will destroy them.

A Prime Problem

The legendary Atlantis is proven to be real and it's residents aren't exactly peaceful.

Atlantis, Arise!

Jazz, Bumblebee and Sparkplug are up against insurmountable odds when Megatron manages to turn the recharging Autobots evil.

Attack of the Autobots

The Decepticon ship that shot down the Ark has been found and Megatron manages to find a component containing great power. With this power a danger to everyone, Perceptor, Bumblebee and Brawn shrink down and journey through Megatron's body to get it away from the Decepticon leader.

Microbots

The Constructicons trick Grapple and Hoist with claims of having left Megatron. They construct a tower Grapple thought up to absorb solar energy, which Optimus Prime did not want to be built for fear of The Decepticons getting their hands on it. Not surprisingly, The Constructicons betray them.

The Master Builder

The Insecticons become extremely powerful after they consume an energy source. They enslave every Decepticon except for Megatron. The Decepticon leader and the Autobots will have to team up to return the Insecticons to normal.

The Insecticon Syndrome

Megatron seizes control of the Torq III computer, enabling him to control the flow of oil.

Day of the Machines

Megatron and a politician team up to slander the image of the Autobots.

Megatron's Master Plan (1)

While Megatron and Shawn Berger enjoy Decepticon Day in Central City, Spike tries to find video evidence that proves the Autobots are innocent!

Megatron's Master Plan (2)

Red Alert is damaged during a battle, making him rather paranoid. This causes him to join forces with Starscream, who wants to get a hold of the Negavator.

Auto Berserk

The Decepticons plan to take New York and turn it into their new home base, disassembling Optimus Prime in the process. The rest of the Autobots must save Optimus and New York City without their leader.

City of Steel

Both Autobots and Decepticons are facing tough times as they are in need of the element called Cybertonium. The Decepticons quickly get as much as they need, but the only way for the Autobots to get it is to rely on The Dinobots, who have been unaffected by all this. However, the Dinobots have been getting annoyed with The Autobots lately and leave them.

Desertion of the Dinobots (1)

Both Autobots and Decepticons are facing tough times as they are in need of the element called Cybertonium. The Decepticons quickly get as much as they need, but the only way for the Autobots to get it is to rely on the Dinobots, who have been unaffected by all this. However, the Dinobots have been getting annoyed with the Autobots lately and leave them.

Desertion of the Dinobots (2)

From the moon, Megatron manages to interfere with the radio transmissions on Earth. Blaster and Cosmos go to put an end to his plot as the other Autobots work to help those affected by the loss of radio transmissions.

Blaster Blues

Spike, Hoist and Warpath find their battle with a group of Decepticons interrupted when they all get sent back in time to the middle ages.

A Decepticon Raider in King Arthur's Court

Astrotrain tricks a race living on one of Saturn's moons, Titan, into thinking he is a god and gets them to do his bidding, which includes getting a hold of a newly discovered power.

The God Gambit

Megatron plans to drill his way to Earth's core in hopes of getting large amounts of energy. The Autobots try to stop him and initiate their new plan to take control over Devastator. When both sides battle for controlling Devastator, though, it causes disaster.

The Core

After someone steals him, Tracks is briefly unable to transform or talk. This isn't so bad, however, as it leads to the discovery that Decepticons are planning to turn stolen cars into weapons.

Make Tracks

Most of the Autobots lose their ability transform to robot mode after the Decepticons use a device on them. A handful of Autobots still capable of transforming are their only hope.

The Autobot Run

A lagoon within a forest is discovered and found to contain a substance called electrum, which can make anyone invincible. The bad news is that the Decepticons manage to use it on themselves first.

The Golden Lagoon

On the way to Earth with a type of insecticide to use against the Insecticons, Spike, Bumblebee and Cosmos encounter Morphobots. They get away just fine, but they inadvertently take Morphobots along for the ride.

Quest for Survival

Omega Supreme reveals his past to Optimus Prime, which involves a city's destruction, Megatron and Constructicons.

The Secret of Omega Supreme

The space bridge accidentally sends several Autobots and Decepticons to a strange world in which they are no bigger than toys.

Child's Play

With the others rendered powerless, Smokescreen has to enter the gambling world to get the Energon needed to revive them.

The Gambler

Elita-1, leader of a group of female Autobots causing trouble for the Decepticons, is captured and used as bait to lure Optimus Prime into a deadly trap. However, Elita-1's strange time manipulation technique saves him, but leaves her close to death. Her only chance for survival lies in Alpha Trion.

The Search for Alpha Trion

Innocent people fall under Megatron's control through music being played at a club.

Auto-Bop

A hunter sets his sights on Optimus Prime and uses several captured Autobots to force him into a confrontation.

Prime Target

The Decepticons are trying to learn the secret surrounding a man's invention and go after his teenage daughter. Powerglide intervenes to rescue her, but this causes her to fall in love with him.

The Girl Who Loved Powerglide

Astrotrain and Blitzwing leave The Decepticons to do things their way, which includes capturing Megatron and Starscream and seizing control of a stadium.

Triple Takeover

Seaspray falls in love, but the object of his affection is part of a rebel movement on another world.

Sea Change

Hoist gets a big break into show business after rescuing stuntmen. Sunstreaker, Powerglide, Warpath and Tracks are along for the ride as well. On the road to a movie career, however, they learn Dirge has stolen a device from Wheeljack's lab.

The Decepticons work with a smuggler to take over a Mideast palace and begin acquiring plane parts for the construction of a air fortress. The Aerialbots head to the scene, but Slingshot and Sky Dive get into trouble. But a young man known as Hassan comes to their aid to help save the day.

Aerial Assault

The Autobots capture the Stunticons during one of their thefts. With the Stunticons now imprisoned, Wheeljack presents a way to disguise Autobots as them. Going undercover, Optimus Prime, Jazz, Mirage, Sideswipe and Windcharger infiltrate the Decepticons and learn the Stunticons were trying to steal a part for a laser. However, the plan hits a snag after the real Stunticons escape.

Masquerade

Some Autobots take part in a charity race in Europe, but it's all a Decepticon ploy to obtain metal from Augie Canay's car in order to house the Pearl of Bahoudin. With their teammates damaged by the Stunticons, it will be up to Bumblebee, Bluestreak and Tracks to stop the Decepticon plot.

Trans-Europe Express

Some Aerialbots start to have doubts about their cause, some have started to admire Megatron, and are thinking of switching sides. They get pulled into a time warp, and end up on Cybertron, before the current war began. They'll discover more about Megatron, and the origin of one of their own.

War Dawn

Megatron causes his fellow Decepticons to be infected with the deadly Cosmic Rust. Perceptor is captured to find a cure and he does, learning that element X will do the job. The Decepticons are cured, but then they use Perceptor to spread the Cosmic Rust to the Autobots and element X is in short supply.

Cosmic Rust

A creature made out of energy, Kremzeek, gets made and causes trouble for the Autobots, Decepticons and Japan.

Kremzeek!

Failing to topple Megatron, an exiled Starscream plans his revenge. He uses World War II era machines and five personality components to create the Combaticons, which prove very powerful in their Bruticus form.

Starscream's Brigade

Seeking revenge against Autobot and Decepticon alike, the Combaticons hijack the Space Bridge and use it to alter Earth's orbit, putting it on a collision course with the Sun. With the only means to get off-world damaged in battle, Optimus Prime and Megatron must race against time to stop the Combaticons before the Earth is destroyed.

The Revenge of Bruticus

During a battle, the Protectobots finish off the Combaticons, with the exception of Swindle. Megatron orders Swindle to reconstruct his destroyed comrades or else a bomb in his head will go off, destroying him. As Swindle works to complete this task in time, three students get a hold of Brawl's personality component and use it for their science project, B.O.T., with disastrous results.

B.O.T.

The Transformers is the first animated television series in the Transformers franchise. The series depicts a war among giant robots that can transform into vehicles and other objects.

The Key to Vector Sigma (1)

Seasons4

Season 2 Episodes49

Cast18

Crew2

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