Two Bolkins (sheep-like beings from Third Earth) unleash the ghost of Grune the Destroyer, a renegade Thundercat who once terrorised Third Earth and now turns his attention to the Thundercats.
| Creator | Theodore Walter Wolf |
|---|---|
| Actor | Larry Kenney, Peter Newman, Earle Hyman |
| Country | United States of America, Japan |
| Production | Rankin/Bass Productions |
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