My Life as a Teenage Robot

Hostile Makeover (1x17)

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When Jenny starts to develop face-bolts, voice changes and excess wires growing out of her body, Brad chalks it up to puberty. However, it soon becomes apparent that the "puberty" is actually the doing of Queen Vexus of the Cluster, who has infected Jenny with a virus to warp her into a loyal, Cluster-controlled monster.