"Voltron: Defender of the Universe" is a loose English-language adaptation of a 1981 anime series called "The King of Beasts, Go-lion."

The reasons why the character designs differ from episode to episode is that several teams of animators worked in different episodes to complete 52 episodes within a six month period. Japanese animators (because of budget restraints and tight deadlines), must complete animation within a short time period, unlike Western animators who have the time and budget to finish their works within a year or two.

The company that adapted "King of Beasts Go-lion" (Lion Force) and "Dairugger" (Vehicle Force) into "Voltron: Defender of the Universe" also wanted to dub another anime robot series called "Lightning God Albegas," but for some mysterious reason it never did. Some people speculated that the sexual perverted behavior of one of the major characters from Albegas, or the unaesthetic appearance of the six-armed robot may be the reason why the series was never dubbed. Interesting enough, toys based on Albegas were sold under the Voltron name.

Any enemy soldier or creature in Voltron is depicted as a "robot" as not to mention any reference to death. However, there are several instances in the series that showed that the "robots" are flesh and blood beings.

All the female slaves' voices were done by male voice actors.

This is the only episode that Prince Lotor does not appear in ever since he made his first appearance in "Yurak Gets His Pink Slip."

In Go-lion, the people depicted as falling unconscious after contact with the flowers are dead.

This is the only Voltron episode which Princess Allura did not appear in.

This series is commonly known as "Lion Force Voltron," because of the five robot lions that form Voltron.

In Go-lion, at least one sentiment being dies before the end of most episodes.

This Voltron series is commonly known as "Vehicle Voltron."

Unlike the first series, the animation of the so-called "second season" was done by South Korean animators. This explains why the character designs are different from the previous Voltron season.

While this series did use original animation, in most episodes, animation from the "first season" appeared on them so that the production company can save money. As a result of this, many episodes have very inconsistent animation, as most episodes were done by different animation teams.