Moby Dick and the Mighty Mightor

Cult of the Cavebearers [Mighty Mightor] (1x33)

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Chief Pondo and all of the men (except for Tor) go on a hunting trip. While they are away, the Cavebear Warriors come to the village and capture Sheera and Li'l Rok. Tor sees their tracks and turns himself into Mightor so he can attempt a rescue.