Gigantor (1963)
S02E13 The Insect Monsters!
Episode Overview
Dr. Buzz Bugaboo is captured by Brany Mantis, who compels him to hand over his formula for creating massive insects. Once in possession of the formula, Brany releases the enormous bugs into the city, overwhelming its defenses with their sheer numbers, leaving even Gigantor struggling to contain the chaos.
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