Out of Mind, Out of Sight (story by Joss Whedon, written by Ashley Gable & Thomas A. Swyden)
I love the premise of this episode: that someone is so invisible to her classmates that she literally becomes invisible. As an occasional invisible girl myself, I would have preferred her not to become quite so insane and murderous but as it is written it's chilling. Unfortunately, the ending is atrocious and casts a pall over the episode: government involvement has no place in BtVS (oops).
Clea DuVall was excellent as Marcie but rather miscast because she is one striking woman. By the way, Marcie was not “unpopular”, unpopular children are actively disliked whereas no one even saw Marcie to care.
Cordelia developed (at last) from being a funny bitch (“I don't recall ever seeing you here before.” “Oh, no, I have a life.”) to become a bitch with a hidden heart: “You think I'm never lonely because I'm so cute and popular? I can be surrounded by people and be completely alone. It's not like any of them really know me. I don't even know if they like me half the time. People just want to be in a popular zone. Sometimes when I talk, everyone's so busy agreeing with me, they don't hear a word I say.”
Willow was wearing a Scooby Doo t-shirt! It's a pity her hair's in the way.
“Well, I don't even like chocolates. Okay, that was the lamest comeback of our times.”
“A vampire in love with a Slayer! It's rather poetic in a maudlin sort of way.”
“Oh, my God! 'Have a nice summer. Have a nice summer.' This girl had no friends at all.”
“Oh. 'Have a great summer.' See, I cared!” (Willow’s response here is so in character)
“Nothing is keeping me from the Bronze tonight!” “Can we just revel in your fabulous lack of priorities?” “If I'm not crowned tonight then, then Marcie's won! And that would be bad. She's evil, okay? Way eviler than me.”
“Let me see. I think we should start with your smile. I think it should be wider.”