An inquisitor was a Gallifreyan judge (TV: The Mysterious Planet, etc.) and an officer of the Inquisition. (AUDIO: Lies) The most senior judge was called Inquisitor Prime. (AUDIO: The Inquiry)

During the judicial inquiry into the Sixth Doctor on the Space Station Zenobia, Darkel assumed the role of inquisitor. (TV: The Mysterious Planet, etc.) She later did the same for the Valeyard's trial (AUDIO: Trial of the Valeyard) and for the attempted impeachment of President Romana. (AUDIO: The Inquiry)

The Eleven asked Kiani if she wanted to be an inquisitor. However, she had further ambitions and wanted to do something more "hands on". (AUDIO: The Eleven)

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