The second of the new Doctor Who episodes is called “The Devil’s Chord.” The title and the opening sequence make reference to the notion that the church banned tritones because they were demonic. Although Doctor Who started out aiming to teach young people about history, it has regularly repeated pseudohistorical notions, and this most recent episode is an example of that. The fact that someone called the dissonance created by two notes a half step apart or by a diminished... Read more