Fool for Love
When a vampire impales Buffy with her own stake, she wants to find out how her predecessors have lost in battle. Because of Giles' lack of info on the final battles of previous Slayers she turns to the only person she knows who has killed two: Spike. In exchange for cash, he not only details why his victims lost their battles, but his personal history as a vampire. Meanwhile, Joyce's condition worsens and she has to spend the night at the hospital.