 The theme and incidental music were composed by David Arnold and Michael Price. Arnold explains that he and Price worked with the producers to "come up with a central theme and character" for the series, then found what was "going to be the defining sound of this show". Pieces were often constructed using synthesizers, but the tracks used for the show were recorded using real musicians, Arnold says, to bring the music "to life". Similarly, Price comments that the musicians can adapt their performance of a score by responding to footage from the show.
