Grimlock's New Brain

A freak accident makes Grimlock a genius, and the suddenly-brilliant Dinobot becomes the Autobots' best hope against a deadly threat.

On Cybertron, the Autobots are unveiling a new generator that will better supply them with power. As Rodimus Prime signals Grimlock to activate the machine, Grimlock admits he's forgotten which switch to pull, and manages to trigger several alarms before Rodimus points out the switch he's supposed to pull. Grimlock points out that he is "smartest Dinobot of all," which Perceptor notes is probably true, wishing the Dinobots had more sophisticated brains. Grimlock, mildly insulted, threatens to bash Perceptor's brain. Elsewhere, a Skuxxoid and Slizardo are sneaking into the generator to place anti-electrons inside the device, a mission Galvatron has paid them to carry out with the aim of eventually killing the Autobots.

In space, Cosmos and Sky Lynx are flying back to Cybertron, musing that they're late for the ceremony. Cosmos suddenty finds himself flying out of control, and when Sky Lynx swoops in to help, he loses control of his auto gyros too. The other Autobots spot their predicament and rush to help as the two fliers crash into Power Platform Alpha. Springer tries to air lift Sky Lynx to repair bay, but also begins to malfunction. Perceptor concludes that the problem is originating in the generator and Rodimus, Ultra Magnus, Grimlock, and Kup head down to investigate, using an electro map provided by Perceptor as a guide. The electro map is soon broken by Grimlock, who storms off in a huff after Rodimus yells at him, so while Kup babysits Grimlock, Rodimus and Magnus continue to search for the core. While Rodimus starts malfunctioning thanks to the anti-electrons, Grimlock and Kup reach the generator's controls, and Kup begins to suffer memory malfunctions. Grimlock deactivates the generator with the ever-appropriate tactic of biting it, but immediately begins to act differently. He speaks in a proper manner, with an extended vocabulary, and appears to have lost his taste for combat. He rescues Rodimus and Magnus from a security system they've tripped by simply switching it off. They soon spot Ratbat who has been observing them, but the Decepticon escapes. The Autobots return to the surface and pass the Dinobots fishing in a local pond. Snarl invites Grimlock to join, but Grimlock declines, saying he has more important matters to attend to. The Dinobots are concerned, as they always fish together. Meanwhile Ratbat and reports back to Galvatron. Galvatron threatens to kill the Skuxxoid and Slizardo for ruining his plan, as the anti-electrons have already vaporized and were hard to find, but Slizardo reveals that there is another source of anti-electrons...in Unicron's brain.

Elsewhere, Grimlock concludes that anti-electrons were the source of the problem. As Galvatron's ship approaches Unicron's head, he cautions his soldiers, saying that Unicron may be quite powerful. On Cybertron, the Dinobots seek out Grimlock, who is building a new spaceship, and he asks for their help. Sludge does not like Grimlock's change in attitude, and Slag declares that "Grimlock no fun". With their leader not acting like one of them, the Dinobots decide to go hunting without him. Later, Grimlock has taken Rodimus, Perceptor, and Kup to Unicron's head, having concluded that Unicron's body was the original source. However, Galvatron fires anti-electrons at the shuttle, causing it to crash and the Autobots to malfunction and even causing Rodimus to revert back to Hot Rod. Galvatron then unleashes the Terrorcons on the Autobots while Grimlock runs off. Grimlock then uses components of Unicron to build Nosecone and asks him to drill a hole into Unicron's brain.

Elsewhere, Cyclonus and Scourge are retrieving the anti-electrons when they reactivate Unicron. The Planet Eater's internal defenses activate, but Strafe, another robot built by Grimlock, destroys the defenses. Finally, Grimlock builds three more robots: Afterburner, Lightspeed, and Scattershot, the last of whom he appoints as leader of the Technobots. He sends the Technobots to fight the Terrorcons. Cyclonus and Scourge are handing Galvatron the anti-electrons they've found when the jar is destroyed by the Technobots before they engage the Terrorcons in battle, until the Terrorcons merge into Abominus. Retreating, the Technobots ask Grimlock for advice, and Grimlock reveals that they are also Combiners, commanding them to merge into Computron. The computational capacity held by the gestalt is massive, yet he claims that he lacks the intelligence to feed it. Grimlock connects a device to Computron's head which transfers his super-intelligence to Computron. Now armed with incredible intelligence, Computron is able to defeat Abominus, using intense vibrations to cause the Decepticon combiner to separate, and sends the Decepticons running.

On Cybertron, Rodimus is holding a celebration for the newly functioning generator, the creation of the Technobots, and Grimlock's efforts. However, Sludge reveals that Grimlock is fishing with the Dinobots. Grimlock says that being a genius all the time is no fun, and he'd rather be a regular Dinobot. The Autobots cheer his statement, apparently preferring their one-bot engines of destruction to be simple-minded.

—Grimlock showing Rodimus why he should not have been given such an important task.

—Grimlock threatening to beat up Perceptor.

—Simplifying things for a Dinobot isn't that simple.

—Kup and Grimlock the latter of whom has just received a great deal of intelligence

—Oh snap! Perceptor just got dissed! By Grimlock!