Buffy the Vampire Slayer Season 5 Episode 21 : The Weight of the World

The Slayer in Buffy is catatonic due to Glory's abduction of Dawn so Willow psychically enters her mind. Willow goes through a loophole in Buffy's mind and sees several replays of Buffy's childhood when she first sees her sister; and of Buffy as she is now smothering Dawn to death. Buffy's guilt over Dawn being kidnapped finally proved to her that she is no match for Glory and she believes she killed Dawn herself. Meanwhile, Glory vents her fr...