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Professor Monster (in Japanese: 教授モンスター) is the leader of the "Iron Cross Army" and the arch-nemesis of Spider-Man (クモ男). He is the main antagonist in the Japanese Toei Spider-Man TV Series (1978-1979) . He has destroyed Planet Spider (惑星のクモ) and since has become the object of vengeance to Tukaya Yamashiro (山城 拓也).