Crystal Castles has been played over 30 times on NTS, first on 1 July 2013. Crystal Castles's music has been featured on 31 episodes.

Crystal Castles were an experimental / electronic band which formed in 2003 in Toronto, Ontario, Canada and last consisted of Ethan Kath and vocalist Edith Frances. Alice Glass served as the lead vocalist for the group since its foundation until 2014.

They are named after the lyrics "The fate of the world is safe in Crystal Castles" and "Crystal Castles, the source of all power" both from the theme song for She-Ra's fortress. They are known for their melancholic lo-fi sound…