Willow The best of the Buffy The Vampire Slayer TV episodes featuring Willow! Phases: The gang tries to save a werewolf from a poacher; Oz makes the startling discovery that he is the werewolf in question. Doppelgangland: Anya wreaks havoc again when a spell goes awry bringing Willow's vampire doppelganger into the Buffy-verse. Wild At Heart: Oz and Willow's relationship is up in arms when Oz is powerfully drawn to a female werewolf. New Moon Rising: