"Include hashtag #ThreeFamilies during tonight's episode. When we hit 1,000 tweets, we'll release a preview for next week's episode."

So if you use Twitter, make sure to use that hashtag to unlock the preview.

Also, if you happen to use Twitter, don't forget that you can also follow Life, Doctor Who & Combom and some of its authors, including 10thPlanet, PCJonathan, HuonTron, and SkaroRevenger.