Their relationship ends traumatically. After seeing the kiss, Cordelia runs away, falls through a weakened staircase, and is impaled on a piece of rebar. While she survives, she tells Xander to "stay away" from her.
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"Lovers Walk" (Season 3, Episode 8) is widely considered one of the most pivotal episodes of Buffy the Vampire Slayer (BtVS), as it permanently reshapes every major romantic relationship in the series. Episode Title: "Lovers Walk" Original Air Date: November 24, 1998 Director: David Semel Writer: Dan Vebber Their relationship ends traumatically