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The Monk told Dr Kurdi that he considered the sound of an alarm to be his theme tune given his youth on the run from the universe's security forces. (AUDIO: The Rise of the New Humans [+]Loading...["The Rise of the New Humans (audio story)"])
Bill Potts told the Twelfth Doctor that the theme tune of The Vikings was "amazing". (TV: Empress of Mars [+]Loading...["Empress of Mars (TV story)"]) He identified his own theme tune as the sound of a distress call. (TV: Oxygen [+]Loading...["Oxygen (TV story)"])