Sick of his son's failures, King Zarkon himself steps in and puts all his resources behind a huge plan to wipe out Planet Arus. Using the power of a hidden Lazon satellite, Zarkon plans to turn all 500 of his remaining gladiators into an army of Super Robeasts! But Sven gets wind of the plan, and infiltrates the armies of Planet Doom at great personal risk. Sven must find the satellite’s location so Voltron destroy it before it's too late!

A remote planet named Yadil has thrown off the bounds of Zarkon's oppression. They decide to join the Alliance, and invite Voltron to a celebration in honor of this great event. However, Voltron shows up strangely early, and with him a strike force of Doom Soldiers. They take over Yadil and set a trap for when Keith and the rest of the team arrive with the real Voltron.

Lotor enslaves a peaceful planet, and forces the locals to build a gravity trap for Voltron. The local adults are quick to give in, but their kids are not. They use their knowledge of the area to set a trap for Lotor, but they’re captured and become part of the trap for Voltron! Voltron and the team are forced to fight a new military-grade Robeast while rescuing the kids, and with all their automatic systems disrupted by the gravity wave!

Lotor sets up his command base on a desert planet, planning to enslave the peaceful Sand People and turn them into Robeasts. A local researcher, Professor Sawa, realizes what's happening and calls in the Voltron Force. Princess Allura meets with the Sand People, and sees that they are innocent and childlike. She gives one her bracelet as a present. But when Lotor attacks with his new Robeast, Allura recognizes the bracelet on the monster's arm.

Furious at his defeat, Lotor throws Princess Romelle into the Pit of Skulls, from where no one has ever returned. But she is rescued by a wild man, an escaped slave who has been living alone in the caves under Planet Doom. Shocked, she realizes the wild man is Sven, former member of the Voltron Force! Romelle must help Sven reconcile with his painful past and take up the mantle of a hero once again!

Trying to protect Planet Arus, Prince Bandor has been forced to bombard the Omega Comet with his fleet, while Voltron was still on it! The comet has been redirected, careening toward the End of the Universe with a seemingly dead Voltron still trapped on it. Violating a command from Galaxy Garrison, Bandor tries one last-ditch plan to save Voltron, and fails as Lotor's surprise attack cuts his fleet to ribbons!

Haggar gains control of the Omega Comet, an invulnerable planetoid with the power of a micro-black hole. But before she can crash the Omega Comet into Arus, one of Lotor's slaves warns the Voltron Force. This slave is Romelle, Princess of Planet Pollux and Allura's cousin. But when the Voltron Force arrives, Lotor tricks Romelle into giving them false information, leading to Voltron's defeat!

Lotor sends his special forces to Planet Arus under the cover of night. There, the stealthy soldiers terrorize the people, causing them to lose faith in the protection of Voltron. Out of their minds with fear, the people turn even on the good Princess Allura and the Castle of Lions. Before the Voltron Force can come up with a solution, the special forces manage to disable the Black Lion by sabotage!

An ambitious pilot with a deadly reputation as a loose cannon confronts King Zarkon. He boasts that he can destroy Voltron in exchange for a position of rank. The officers of Planet Doom are not happy, but Zarkon gives the ace pilot, the fastest Robeast ever built. With a Robeast faster than Voltron, and a pilot more skilled than the Voltron Force, Keith and the others have their backs up against the wall.

Zarkon is furious with Lotor's cowardice, and demands that he lead an attack on Arus from the front lines. Haggar creates a clone of Lotor that has no fear whatsoever, and sends it with a new Robeast that can generate a computer destroying electro-magnetic pulse. The EMP shuts down Voltron, so Keith sneaks out to sabotage the Robeast. Separated from the others, he is locked in a duel with the fearless, relentless Lotor clone!