The Green Terror was a green, flesh-eating mass created by Doctor Lorrof in revenge for being evicted from his scientific field. He first sent out the Green Terror upon Titan City. City officials called Professor Philo Zog and his robot Electro to stop the Green Terror. Zog figured out that the Green Terror's weakness was radium and had Electro used an experimental radium gun to put an end to the terror. Dr. Lorrof was later confronted by Zog and Electro and died in a desperate attempt to stop the pair.
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