Season 3 Episode 2
Episode aired october 06, 1998
a nigerian mask reanimates the dead, forcing buffy to battle a horde of zombies.
pat mentions to buffy that joyce read 'the deep end of the ocean' while buffy was gone. it is a 1996 novel by jacquelyn mitchard about a suburban middle-class family much like buffy's that is torn apart when the youngest son disappears, only to reappear at the front doorstep years later.