Angel is a spin-off from the American television series "Buffy the Vampire Slayer". "Angel" has a darker feel than "Buffy", and at times did better in the U.S. Nielsen Ratings than "Buffy". The series was created by "Buffy"'s creator Joss Whedon along with David Greenwalt. It first aired in October of 1999. Like "Buffy", it was produced by Whedon's production company, Mutant Enemy.