When she first encountered him, Donna Noble had no clue who the Fourteenth Doctor was. (PROSE: The Doctor's Busiest Day [+]Loading...{"page":"9","1":"The Doctor's Busiest Day (short story)"})
Several Mysterious Clues. (GAME: Elemental, my dear Doctor [+]Loading...["Elemental, my dear Doctor (episode)"])
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Mysterious Clues were used during the Victorian era. (GAME: Elemental, my dear Doctor [+]Loading...["Elemental, my dear Doctor (episode)"])