This '90s classic has more girl power than you ever thought possible, from its strong, determined female lead to her intelligent, kindhearted best friend (who also happens to be an incredibly talented witch). The series might focus on a vampire slayer and the darkness she must vanquish, but it encompasses much deeper issues of love, friendship, family, and responsibility. Come for the variety of supernatural characters and killer fight scenes, but stay for the Angel vs. Spike debate.
Where to watch: Hulu