Intervention

In which Spike takes possession of new-model Buffy-bot and hilarity ensues when the gang mistakenly thinks it's the real Buffy boffing him! Then Mr. Roper ... sorry ... then Glory gets her hands on him and messes up his pretty face, necessitating a rescue/elimination sortie.

Official back-of-box synopsis:

Buffy goes on a quest guided by the first slayer. Meanwhile, Spike builds a Buffy robot who is hopelessly devoted to him.

From the old WB Buffy website:

FULL OF LOVE - Buffy travels to a sacred location on a solemn quest guided by the first slayer with the hopes of uncovering why she has become emotionally paralyzed and to help regain her focus towards slaying. Back in Sunnydale, unable to have the real thing, Spike builds a Buffy robot, who is a picture-perfect replica and so devoted to the rogue that it leaves the Scooby gang reeling and Glory's minions convinced he is the Key.

Links:

This episode's page at http://www.restlessbtvs.com/, the Restless BTVS Trivia Guide

This episode's page at http://www.vrya.net/bdb/, the Buffyverse Dialog Database

Cross-reference:

episodes in which characters have twins:

• Doppelgangland
  Evil Vampire Willow from the Wishverse
• The Replacement
  Xander isn't himself, he's himselves...
• this episode
  The Buffybot

Cast:

• Sarah Michelle Gellar as Buffy
• Sarah Michelle Gellar as The BuffyBot
• Alyson Hannigan as Willow
• Nicholas Brendon as Xander
  

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• Anthony Stewart Head as Giles
• James Marsters as Spike
• Emma Caulfield as Anya
• Amber Benson as Tara
• Sharon Ferguson as The First Slayer
• Michelle Trachtenberg as Dawn
• Clare Kramer as Glory
• Troy T Blendell as Jinx
• Adam Busch as Warren
• Todd Duffey as Murk