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The Doctor's real name has never been revealed on screen. There is a never-filmed version of the closing scene from "A Good Man Goes to War" that suggests the High Gallifreyan lettering on the Doctor's cot spells out his name, however as this scene was never filmed and no subsequent episode has ever returned to this, it doesn't count. The non-narrative book The Making of Doctor Who by Terrance Dicks and Malcolm Hulke, in its 1976 second edition from Target Books, rendered the Doctor's name in random mathematical symbols.