Season 7 Episode 10
Episode aired decmeber 17, 2002
giles returns to sunnydale with three potential slayers, whom buffy must protect from the first. meanwhile, a ferocious uber-vampire is released from the hellmouth and buffy must kill it before it kills one of the potentials.
when xander says, 'it's a loop... like the mummy hand!' he is referring to life serial (2001), in which buffy is caught in a time loop and must battle a severed, magical mummy's hand.