Buffy vs. Dracula / The Real Me
In "Buffy vs. Dracula", a dark visitor arrives in Sunnydale to seduce and turn the Slayer. While Buffy battles the irresistible thrall of history's most notorious vampire, the Scoobies attempt to protect her from his advances. All except for Xander, who under the Renfield-whammy, has turned to eating spiders and betraying Buffy in exchange for immortality. Kristen and Mike discuss Giles' decision to leave Sunnydale, and Mike teaches Kristen some Dracula basic facts. It's hard being a teen and the sister of the Slayer.
In "The Real Me", we meet Dawn, Buffy's always sister that has definitely existed for the entire series. While Buffy tries to learn more about the origins and the extent of her power, she's having trouble fitting in her responsibilities as a big sis. And an old foe returns for a final deadly battle - Harmony. Kristen and Mike recall their initial reactions to Dawn, and examine her relationships with the other characters.
PLUS! We answer Joe's question: What other characters/groups could have been spun off?