List of Transformers: Armada Episodes - Season 4

Season 4

This season is subtitled The Unicron Battles.

No. Title Original air date
41 "Depart"
The Autobots are ready to head home and leave the kids behind. Rad has a nightmare in which the Autobot ship is shot down and Highwire collapses on the floor saying "You must help us, Rad." In the end Perceptor and the other Mini-Cons surround the spaceship and make the Autobots bring the children with them.
42 "Miracle"
As the Decepticons attack the Autobots' ship, the Mini-Cons bring Optimus Prime back to life.
43 "Puppet"
Optimus Prime is revived by the Mini-cons but the reunion is short as Red alert and Hotshot are pulled into a portal. A portal also pulls in Megatron on his ship as well as Starscream, Tidal wave and Demolisher. The ones pulled through a portal end up on a strange planet where they find Nemesis Prime. Megatron, Demolisher, Tidal wave, Starscream, Hotshot and Red Alert team up to defeat Nemesis Prime but fail. The Mini-cons revive the fallen soldiers into new colored armor. Megatron becomes Galvatron and kills Nemesis with the help of Optimus Prime. The rest of both sides arrive and depart the planet.
44 "Uprising"
The Decepticons are back on Cybertron with the Autobots hot on their heels, until the Mini-Cons are concerned about a black hole called Unicron. Meanwhile at the Decepticon base, we see to whom Thrust is truly loyal.
45 "Dash"
Hot Shot makes a daring raid upon the Decepticons' base to try to convince Galvatron that the two sides should combine to face Unicron. The conversation is cut short when Thrust's treachery is revealed.
46 "Drift"
The kids discover the shocking truth about the Mini-Cons and learn the pivotal role they played in how the Mini-Cons came to Earth.
47 "Portent"
The kids, Hot Shot, Wheeljack and Starscream chase Thrust into the bowels of Unicron but they failed to stop Thrust from delivering the 2 of 3 weapons to the heart. Acid vines and even parasites forced them to retreat.
48 "Cramp"
Optimus Prime decides to talk to Galvatron, hoping that the Autobots and Decepticons can join forces to defeat Unicron, but Galvatron suspects that it's all a trap. While the two leaders are fighting, Starscream appears and attacks Galvatron, in a surprisingly heroic moment, he sacrifices himself to show both sides what the important thing is: defeating Unicron, and in a desperate attempt, tries to attack Unicron. He unfortunately fails and is killed by Unicron.
49 "Alliance"
As Unicron fires a wave at Cybertron, the Decepticons debate Galvatron's decision to join forces with the Autobots. Meanwhile, deep inside Unicron, Thrust plants the Star Saber near the planet-eater's spark, which is wrapped in organics. Unicron attacks Cybertron, forcing the Autobots and Decepticons to flee to their ships. Though some are destroyed (mainly Decepticons), the Mini-cons provide shielding. Once in safe orbit, Optimus and Galvatron shook hands, declaring that both Autobots and Decepticons fight together for peace and harmony to defeat Unicron. The transformers armada fires at Unicron it has no effect. Two cruisers tried to get closer but were shot. Optimus sends Hot Shot, Demolisher, Cyclonus, Sideswipe and a team of Decepticons in pods to check for Unicron's weak spot. Cyclonus and the team go off, shooting everything in sight; Demolisher and Blackout go solo; and Hot Shot and Sideswipe go do their jobs. Just then, Unicron starts to transform while laser pods start attacking the away team. The armada starts firing away while the team had difficulty getting off. Jet Optimus go to rescue them and gets saved by Galvatron. As they get away, Unicron's transformation into robot mode is complete.
50 "Union"

As Autobot and Decepticon ships fled Unicron, Thrust gleams at victory. The scene flashes back to Sideways planting the Star Saber near Unicron's spark. Meanwhile, Optimus and Galvatron plans an infiltration to enter Unicron. Just then, Unicron heads for Cybertron. Hot Shot and Wheeljack head out in fighters but do little damage. Thrust gloats and demands Unicron attack but is instead ambushed by the transformers fighters.

Hoist finds a weak point on Unicron's neck and so an attack is made. Unicron opens his chest and fires his cannon, destroying a portion of Cybertron. Using the Decepticon flagship, they held back the attack. Powerlinx Galvatron and Optimus head towards Unicron and confront Thrust. Thrust tried to verbally defend himself but fell in Unicron's shoulder joint. He pleaded for help and Galvatron gives him two choices: Thrust would be blasted and killed then, or he would get out himself, and if he did, there would be no place to hide. The disobedient Decepticon is then crushed as Galvatron walks away. Meanwhile, the Mini-cons joined together and fought back against their creator while Galvatron and Optimus enter the behemoth. The Street Action team proposes to go inside Unicron, which is also accessible through the underground warpgate. The Mini-Cons and the kids went through before the tunnel collapses on Red Alert.
51 "Origin"

Red Alert survives the cave-in he was trapped in while he was dropping off the kids at the underground portal to Unicron. Above the ruined landscape, he can see Unicron battle against the combined forces of Autobots and Decepticons, and the giant Mini-Con duplicate of Unicron.

Inside of Unicron, the kids explore, searching for Optimus and Galvatron. The two leaders stand in the same chamber of Unicron's core, where the three Mini-Con weapons are plugged into the behemoth. From the core of the monstrosity, Sideways emerges to kill the two. Through Sideways explains how Unicron increased his power by leaching energy from the war between the Autobots and Decepticons that had lasted for so long.

When Galvatron complains that Unicron has become long-winded, Unicron suspends the two leaders in black tentacles, absorbing Optimus's very essence. Unicron continues to question Optimus's own motives, suspecting that Optimus loves the smell of battle.

Outside, Side Swipe blasts open a hole in Unicron's throat, letting a team of fliers inside. The small group of jets fly through the tunnels of Unicron's interior, trying to avoid being destroyed by the shifting terrain. But their efforts to combat Unicron actually feed their enemy the kind of energy that powers him. As soon as his attackers escape out his mouth, he astonishes them by healing all the damage they have inflicted against him. In Unicron's core, High Wire objects to Unicron's deconstruction of Optimus. A group of Mini-Cons approach the Sideways figure, while outside, the glowing "Mini-Cron" leaks its component Mini-Cons into Unicron. Unicron laughs and reboots the personalities of the Mini-Cons, returning them to their loyal drone-like state. With the Mini-Cons out of the way, Unicron captures the kids and continues trying to convince Optimus to willingly merge his essence into Unicron. Rad awakens in his bed, apparently on Earth. After a second, the location blurs into the desert where the Autobots and the Decepticons first battled, where he meets up with Alexis and the other kids. The background shifts again to the part of Unicron that is Galvatron's fantasy of dominance. Alexis uses her own mind to move the kids to a more pleasant delusion - but the kids are still aware of Unicron's devouring of Cybertron. Rad sets out to locate High Wire, but Unicron takes control of the mindscape. Rad's cries for help reawaken High Wire's true, friendly personality. All the Mini-Cons move against their evil creator, freeing the three Mini-Con weapons. With Unicron disabled, Sideways tries to lash out at High-Wire, but Optimus defeats the shell with the Requiem Blaster. With Unicron no longer a threat, Galvatron challenges Optimus.
52 "Mortal Combat"
The alliance between the Transformers leaders ends. Hotshot and the other Transformers attack Unicron once more. Optimus Prime and Galvatron fight to the death. It ended only after Galvatron makes a heroic sacrifice to destroy Unicron. After the battle Rad, Carlos, Alexis, Billy and Fred are returned to earth. A charred Optimus Prime is seen floating through space. At the very end the remains of Unicron drift through space, showing the war is not over.

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