Doppelgängland

These snapshots may contain SPOILERS for the entire series, so if for some reason you haven't yet seen some of the episodes and do not want to know what is going on, read no further.
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Anya convinces an unsuspecting Willow to assist her with a spell that

will return her amulet and, with it, her Vengeance Demon powers. Willow, sensing something wrong with the magic, balks at the last minute and disrupts the spell. Instead of returning the amulet, the spell summons the vampire Willow from the alternate universe in "The Wish" and sets her loose in Sunnydale.
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WILLOW: It's really nice that you guys missed me. Say, you all didn't happen to do a bunch of drugs, did ya?


Great character development, great dialogue and a good plot.

"Doppelgängland" is a success because of Willow. She's just wonderful. There are really four different incarnations of Willow in this episode and all of them are an absolute joy to watch. Vampire Willow, Real Willow, Real Willow pretending to be Vampire Willow and Vampire Willow pretending to be Real Willow. But, it's pretty easy to tell them apart, because of the way that they act. Vampire Willow beats up just about everyone she meets. Real Willow tapes "Biography" every night. Real Willow is uncomfortable in Vampire Willow's leather and platform boots. Vampire Willow cringes at Real Willow's fuzzy pink sweater. "This is like a nightmare." But then Angel insinuates that a person's vampire self is actually influenced by their human personality. Nice to know.


First appearance of D'Hoffryn,


Foreshadowing
Willow: It's horrible! That's me as a vampire? I'm so evil and...skanky. And I think I'm kinda gay.
Buffy: Willow, just remember, a vampire's personality has nothing to do with the person it was.
Angel: Well, actually... [Buffy gives him a look] That's a good point.
- season 4 (gay) & 6 (evil)

vamp!Willow repeatedly uses the phrase "bored now."

My views/status of characters;
Buffy - like
Willow - like
Xander - like
Giles - like
Cordelia - like
Spike - absent
Angel - neutral
Oz - like

Overall I consider this a very good episode compared to the rest of the season.