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While burying one of the time capsules that transported the Thundercats to Third Earth, it smashes apart and Lion-O gets caught in its gases, making him younger and younger by the minute. The other Thundercats must find a way to reverse the process and realize the Cave of Time is the only way, but they must get Lion-O there before he "vanishes" from existence. Things get worse when the young Lion-O and Snarf are captured by the Lunataks.
First Air Date : Jan 23, 1985
Last Air date : Sep 29, 1989
Episode : 130 Episode
Season : 4 Season
Runtime: 22:14 minutes
Studio: Syndication
Country: United States of America, Japan