In 'Portal Through Time', the Master may be gone, but he's not forgotten. One of the vampire lord's devotees has set out to alter the past, killing off Slayers so as to change the future -- without Buffy, no one will stand in his way as he resurrects his king.
He's conjured up a portal through time to send his minions through -- and they're poised to murder the most influential Slayers in history. The Scoobies are forced to follow them through the portal, in a wild race against not only evil, but time. And the problem is that you can't alter the past without changing the present.
