Keith, Lance, Sven, Hunk and Pidge arrive to find Planet Arus in ruins. They are captured by King Zarkon's forces, commanded by the arrogant Commander Yurak, and taken to Planet Doom, but manage to escape.
The explorers return to Arus and discover the legendary (but crumbling) Castle of Lions where they meet Princess Allura, and her advisor, Coran. Coran explains the history of Voltron and how the one robot was split into five lions.
Coran and Princess Alura decide to take the newly arrived space explorers (Now known as The Voltron Force.) to the tomb of Allura's father King Alfor to retrieve the keys for the five robotic lions that form Voltron. When they arrive at the tomb Alfor's ghost appears and gives permission for the keys to be removed from his sarcophagus. It is soon discovered that the key to the main Black Lion is missing. Without it, Voltron cannot be formed.moreless
Pidge and the other members of The Voltron Force return to the Castle of Lions safely. They realize that Yurak will launch another attack come dawn. They also realize that only Voltron can defeat Haggar's Robeast. So The Voltron Force and Coran return to King Alfor's tomb to search for the missing Black Lion key. While there they see a group of Space Mice. Thinking the mice may know the location of the key to the Black Lion they trap the mice in a cage to question them. Upon discovering this Alura is appalled since the mice have been her friends since childhood. Alura talks to the mice and asks them about they key. They tell her they thought the key was pretty and took it to their nest as a good luck charm. They are released from the cage and return the key to The Voltron Force. With all five lions the Voltron Force heads into battle and defeats Haggar's Robeast handily.moreless
King Zarkon berates Commander Yurak for suffering defeat after defeat against Voltron. Zarkon orders his execution, but at that moment Zarkon's son Prince Lotor returns from a mission of conquest in the far galaxy. Lotor assumes command of Yurak's forces vowing to defeat Voltron once and for all. He implores his father to spare Yurak's life because he plans to use him for his next plan of attack. Yurak, desperately wanting to regain Zarkon's favor, agrees to go along with Lotor's plan.moreless
The Royal family from Planet Pollux has made a visit to Planet Doom. Lotor seems to have a particular thing against the planet's prince, Avok. So Avok is sent to the arena where he successfully beats a hideous beast. Infuriated, Lotor challenges the man himself and they get into a heated sword fight. But then Lotor spies Avok's sister Romelle and younger brother Bandor standing on the sidelines. Romelle bears a striking resemblance to Allura. While Lotor is busy gawking at her, Avok disarms him. Lotor concedes defeat and praises Avok's skills. Lotor then forms an alliance with the people of Pollux against Arus. The animosity the ruling family of Pollux has for Arus runs very deep. So deep in fact that Avok agrees to be transformed into a Robeast and assist Lotor in an attack on Arus. Once the Voltron Force learns of this, they head to Pollux hoping to peacefully resolve their differences and avoid war.moreless
This one starts out at Galaxy Garrison, with the top brass discussing the escalating war in the Denubian Galaxy. Commander Steele explains how he hopes a summit meeting Allura has called between all the leaders of her galaxy will yield something useful in her fight for Arus, because Earth and its galaxy has its own problems (implying, I suppose, all the struggles Vehicle Voltron has endured battling the Drules).moreless