This article needs a big cleanup.
The category says human, the infobox says humanoid. Which is it?
These problems might be so great that the article's factual accuracy has been compromised. Talk about it here or check the revision history or Manual of Style for more information.
Jonah Gripton was a scientist and the chief warden of Thinktwice prison. He was using the Knowsall machine to feed the minds of the prisoners to the Memeovax. The Tenth Doctor stopped Gripton and the Memeovax from taking over the Earth Empire. (COMIC: Thinktwice)
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