S04E04 Fear Itself
Acção, Drama, Fantasia
In the Halloween night, Buffy is very depressed due to her non-corresponded feelings for Parker, and Willow, Oz and Xander convince her to go to a famous Halloween party in a fraternity with them to have some fun. Anya is also invited by Xander to join the group. However, while decorating the place previously, one of the hosts paints a magic symbol, the Mark of Gachnar, on the floor, and an accidentally spilled drop of Oz's blood awakens the Fear Demon Gachnar who is fed by fear, bringing panic and horror to life on the house.