Amad scientist is a stock character of popular fiction, specifically science fiction. The mad scientist may be villainous or antagonistic, benign or neutral, and whether insane, eccentric, or simply bumbling, mad scientists often work with fictional technology in order to forward their schemes, if they even have a coherent scheme. Alternatively, they fail to see the potential objections to playing God. Not all mad scientists are evil or villains. Some may have benevolent or good spirited intentions, even if their actions are dangerous or questionable, which can make them accidental villains. Occasionally, there are self parodies of mad scientists making fun of the stereotype.

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