The New Adventures of Huckleberry Finn

The Gorgon's Head (1x7)

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In a cave, Tom, Huck and Becky free a maiden who was to be a sacrifice and for that the Guru imprisons them, but the Guru's servant releases them. Together the three head off to get Gorgon's gaze in order to defeat the fire hydra and rescue the maiden, which culminates in the stoning of the Guru.