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Cool McCool is a secret agent who takes several risks to save the world. Despite his powerful skills and super-spy abilities, he can be bumbling, foolish and clumsy at times. His mustache tingles when there's danger lurking about and can also be used as a telephone to contact Number One. A running gag in the series is that after the end of each mission, Cool would do something that would make Number One mad, thus causing him to get ejected. His catchphrases are "Danger is my business!", "When you're right, Number One, you're right" and "That will never happen again." He is cute.