Intro: When one travels back through time, one becomes part of the events leading forward to his or her starting point. So, if one changes history, one also alters the present. Now that we’re clear on that point, what happens when one travels forward in time? We shall soon know and we shall soon be reacquainted with The Doctor’s best known enemies.

Outro: Rip Van Winkle slept for twenty years and Washington Irving made a big deal of it. But The Sea Devils have been abed now for a million years and they’re about to hit the deck. I’ll bet they’re going to get up on the wrong side of the bed. Find out next Sunday night at 11 [source: ChicagoEpguides]