Buffy the Vampire Slayer - Season 4 (1999)

On Halloween, Buffy and her friends find themselves trapped inside a haunted frat house complete with real bats, zombies, and a terrifying demon.

Xander finds employment as a bartender at a pub where some of Buffy's friends turn into terrifying Cro-Magnon creatures.

When Oz falls hard for a sexy singer who also happens to be a werewolf, he must choose between Willow and his own animal instincts.

Spike finds himself targeted by a group of commandos after he escapes from a military lab underneath the Sunnydale campus.

On Thanksgiving, Buffy encounters the spirit of a Native American warrior whose people were wiped out by settlers.

One of Willow's spells causes her statements to become reality, with consequences both entertaining and life-threatening.

When everyone in Sunnydale loses their voice, the Scooby Gang must silently solve the mystery of the monsters who stole their ability to speak.

While attempting to redefine her relationship with Riley, Buffy must also stop demons that are determined to reopen the Hellmouth.

Ethan Rayne returns to town and transforms Giles into a demon. Spike is the only one who can help.

Buffy teams with Riley after she is allowed access to the Initiative; Spike is targeted by commandos.

Tension erupts between Buffy and an ailing Riley as they pursue Professor Maggie Walsh's killer.

Faith awakens from her coma and seeks revenge against Buffy.

Having switched bodies with Buffy, Faith enjoys freedom. Meanwhile, Buffy finds herself at the mercy of the Watcher's Council.

Buffy senses that something is amiss when Jonathan becomes a hero to everyone in Sunnydale.

Buffy and Riley's passionate lovemaking energizes supernatural elements inside a frat house.

Oz's return to Sunnydale leads to his incarceration by the Initiative and complicates the relationship between Willow and Tara.

After joining forces with Adam, Spike drives a wedge between Buffy and her friends. Meanwhile, Angel's return to Sunnydale leads to a violent confrontation with Riley.

Having gained control of Riley's mind, Adam sets in motion his plot to create an army of unstoppable soldiers and destroy the Initiative.

Buffy, Willow, Xander, and Giles experience dreams in which they are pursued by a mysterious figure.