Hmmm… There’s so many. But Chosen (the series finale) springs to mind, the scene with the Potentials becoming Slayers all over the world, well, if there’s another scene MORE about female empowerment in any show, I haven’t seen it. Actually, the entire Season 7, particularly when it involves the Potentials and Caleb, is all about feminism and empowerment (and one of the many reasons it’s one of my favorite seasons, regardless of several fans disliking it).
Also, Anne, season premiere from season 3. ”I’m Buffy, the Vampire Slayer. And you are?” ‘Nuff said.
Surprise, Innocence and Becoming, are all great examples of Buffy as a very strong female character, imho.
What else… Being belittled? I would say The Harsh Light of Day, for sure, with Buffy, Anya, and Harmony being mistreated by the men in their lives. Surprise/Innocence are good examples of it too. Or any episode with Warren, particularly I Was Made to Love You and of course, Dead Things, where he makes his ex-girlfriend Katrina his sex slave and kills her.
Well, those are the first scenes that came to my mind. I’ll publish this as I’m sure a lot of my followers will be able to contribute with a lot more examples for you. ;)