Most of the episode is pretty good. Entertaining. The scene with Vultureman is really funny, and well designed and written. although I'm not sure Vultureman would actually "destruct" all his precious equipment. Slythe and Jackalman then get help from Mumm-Ra. He sends an electro demon to weld the door to the Sword Chamber in Cats Lair shut. Leaving the Thundercats Weaponless as even Panthro is unable to cut through the door to retrieve their Weapons.
The Thundercats then send Snarf through the ventilation ducts to retrieve the weaponry. He is followed by Jackalman. Meanwhile Panthro and Cheetara are captured, and locked up in Castle Plundarr no less. Somehow the Mutants take only a few moments to return to Cat's Lair to continue the fight with Lion-O.
But then something very strange happens. We see Snarf get into the Sword Chamber, and wield the Sword, cut to outside of Cat's Lair where Lion-O fights Slythe and Monkian, and Suddenly Snarf is chasing Jackalman firing bolts from the Sword at him. No explanation as to how they got out.
Snarf throws the Sword to Lion-O, which promptly proceeds to do the Thunder dance, and summon the as of now captured Thundercats in Castle Plundarr. As this is Happening, The Sword of Omens displays an as of yet unknown power. The Power to remotely un-weld welded doors. The welded door to the Sword Chamber glows and magically opens. Immediately afterwards, Panthro and Cheetara are seen walking down the steps to Cat's Lair with weapons in hand. How did they manage to get from Castle Plundarrr to Cat's Lair, go in for their weapons through the now unwelded door, and return outside to conclude the fight; all in a matter of seconds?
Not a bad episode, but the writers seem to be getting sloppy with their time frames, and distances.
In any case an enjoyable episode. Quite recommended despite its minor flaws.