premise: Buffy the Vampire Slayer's creator is Joss Whedon.
hypothesis: Buffy the Vampire Slayer is an American television series created by Joss Whedon under his production tag , Mutant Enemy Productions with later co-executive producers being Jane Espenson , David Fury , David Greenwalt , Doug Petrie , Marti Noxon , and David Solomon . Spike , played by James Marsters , is a fictional character created by Joss Whedon for the television series Buffy the Vampire Slayer and Angel .