Reginald Harcourt was the apparent curator of the Morovanian Museum on Morovania Minor.

The Fourth Doctor discovered that he was being used as a data-storing device for the museum, an expert who had his knowledge stolen by the real curator Jephson, who was pretending to be Harcourt's butler. By feeding Harcourt false data and fictional information, the Doctor made the museum's data system crash, causing all the stolen knowledge to return to the original owners. (AUDIO: The Renaissance Man)

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