Buffy the Vampire Slayer (1997)

S6E6 All the Way

On Halloween night, Dawn and her friend set out to cause some playful chaos and catch the attention of their crushes, but unexpectedly find themselves in a perilous situation. Meanwhile, Xander reveals his plans to marry Anya, leaving everyone in shock, while Tara grows increasingly concerned about Willow's dependence on her magical abilities.