Episode 140 of "Buffy, the Vampire Slayer"
s07e18 Dirty girls

As they drive into town, Willow and Faith find themselves behind a truck. A young girl is thrown out with a deep wound and the truck drives off. The girl is unconcious so they take her to the hospital and report to Buffy. Faith's arrival brings a lot of tension to Buffy's house. All the potentials ask questions, but Faith is only interested in talking with Buffy. They clear the air and then receive a phone call from the hospital. The girl is called Shannon, she tells Buffy about a young preacher that saved her from bringers. He then called her dirty, branded her with his ring and stabbed her. Willow takes a photo of the mark from the ring. Shannon mentions the man's message... that he has something that belongs to Buffy. The gang discover that 'Caleb' is dwelling at a nearby vineyard with his bringers. They set out (against Giles' advice) to confront him, but upon arrival Buffy gets knocked out in one punch. Caleb breaks Rona's arm, before killing Molly and a few Potentials, then he approaches Xander. He says Xander is 'the one who sees things', then stabs his thumb into his eye socket. Spike knocks Caleb away, giving Buffy a chance to rescue Xander. Admitting defeat, Buffy and what's left of the gang escape.