Buffy the Vampire Slayer 7x8

Sleeper

After discovering that an old friend may have been recently sired by Spike, Buffy informs the gang that they must keep a close eye on him. When Spike manages to go out, he gets put in a mysterious trance and then seduces and kills a girl with the evil morphing entity watching over him. Meanwhile in England, Giles finds a fellow watcher close to death. While he is finding out what happened, a man with no eyes approaches Giles from behind, and swings an axe at his head…