‘’The Mountain" is the fifty eighth episode of ThunderCats (original series)
Lion-O takes up mountain climbing, but during one of his climbs, the Mutants attack him with a Thundrainium gun. Lion-O calls the other ThunderCats, but an avalanche traps Panthro, Tygra, Slithe, and Monkian in a cave causing a limited air supply. Meanwhile Jackalman steals the Sword of Omens, but Lion-O manages to get it back and save everyone.
"Out of Sight"
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"The Superpower Potion"