Season 1 Episode 2
Episode aired march 10, 1997
buffy and her friends encounter a powerful vampire bent on opening a portal to a dimension inhabited by demons.
joss whedon noted in the commentary for this episode that he felt horrible for giving eric balfour so many lines with s in them, which he had to recite while in vamp-face. he had such a difficult time getting the lines out around the prosthetics that new ones were designed for vampire characters required to speak frequently; the older style ones were given to vampire lackeys with few or no lines in future episodes.