A show like Buffy the Vampire Slayer is perfect for a spin-off. When you introduce a vast world of vampires and vampire slayers, creating a new show around the most popular character is a natural move. David Boreanaz played Angel, an Irish bloodsucker who's over 200 years old. They moved him out out to Los Angeles, where he works as a private detective alongside others from the Buffy universe. The show ran for five years and earned a huge cult audience, but it never quite had the mainstream appeal as Buffy. Boreanaz now stars on the long-running Fox show Bones, though fans continue to dream of a reunion movie where Buffy and Angel join forces once again.