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‘’Excalibur" is the fifty first episode of ThunderCats (original series)


The Ancient Spirits of Evil show Mumm-Ra the story of King Arthur, and explain to him that the strongest sword that ever existed was Excalibur, Arthur's weapon. Mumm-Ra disguises himself as Arthur, and returns to the lake where the sword is guarded by The Lady of the Lake. Fooled by his disguise, The Lady gives Mumm-Ra Excalibur.

The disguised Mumm-Ra challenges Lion-O to a dual, and Lion-O foolishly accepts the challenge. The swords clash, and Excalibur is victorious. The Eye of Thundera is split in two, and the Thundercats become powerless. Merlin, Arthur's teacher and a famous magician stops Mumm-Ra from destroying the Thundercats, and restores the eye to its original state.


Lion-O and the ThunderCats learn that the Code of Thundera that they live by is shared by others and is part of a universal moral code. They are introduced to Merlin, caretaker of Excalibur, and to the legend of King Arthur and his code of justice, truth, honor, and loyalty. And they learn, after witnessing the futile attempt of Mumm-Ra to subvert the code for evil purposes, that true morality in its highest form is an end in itself and rests on universal moral principles. Any attempt to subvert it or ignore it, as in the foolish duel of Mumm-Ra and Lion-O, is doomed to failure.

Note of Interest

The flashback at the start of this episode shown clips from the episodes "Queen of 8 Legs", "Return to Thundera" and "The Astral Prison".

The legends of King Arthur and his sword Excalibur are two of the most powerful and well-known fables of all time, and this episode features many of the most popular hallmarks of the many different interpretations of Arthur's story, from relatively well-known elements such as Merlin the Magician and the Lady of the Lake, through to Sir Bedivere, the Knight of the Round Table who returns Excalibur to the Lady of the Lake.



Main Characters
Guest Characters


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