Tonight on BBC Three is the premier of Teen Exorcists, in which Brynne Larson and Tess and Savannah Scherkenback, teenage girls from Arizona who happen to be exorcists just like Brynne's dad, visit the UK! I bet they were a huge hit there. After all, Harry Potter author JK Rowling is British and, as Tess Scherkenback says, "The spells and things that you're reading in the Harry Potter books, those aren't just something that are made up, those are actual spells. Those are things that came from witchcraft books." What wonderful ambassadors of American culture these young women are. You can learn more about them in this BBC News profile: "Teen exorcists: Women who expel demons on stage"