"Doctor Satan" is a short story by the American author, Paul Ernst. First appearing in Weird Tales in August 1935, the enigmatic Doctor Satan was described as ‘the world's weirdest criminal—an immensely wealthy man, who has turned to crime to satisfy his longing for thrills.’ There are 8 stories in the Doctor Satan series, with the titular character up against numerous challenges, pitted against his nemesis, the criminologist, Ascott Keane. This is the first story in the series.