Defeat of Ogron; Prisoners of the Bubblemen

Andropon and his robots invade Amzot, where the Herculoids easily defeat them. After Andropon continuously threatens to build replacement robot armies (and Zandor continuously vows to defeat said armies), Andropon pits his top warrior Ogron against Zandor and Zok.
Brotak and his Bubblemen kidnap Zandor and Tara for the purpose of using them in scientific experiments.

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S01E07 - Mekkano, the Machine Master; Tiny World of Terror