A panicked Giles shows up and, after a scuffle which leaves Jenny unconscious, Philip dissolves. When Jenny comes to, she seems normal but her eyes flash. Willow discovers the "Mark of Eyghon" in a book: the demon Eyghon has the ability to possess the body of a dead or unconscious host. They figure out that the demon has jumped from Philip's body to Jenny's. Possessed, Jenny tries to seduce Giles at his apartment. When Buffy comes to the rescue, Jenny jumps out the window. Giles explains to Buffy that he ran with a bad crowd when he was young, and they used the demon Eyghon as a temporary high – directing him in and out of each other's bodies. But one friend died, then Dierdre, and now it seems the rest of the group is being killed.