WTTW split the story into two parts, with the break occuring just before the end of episode three when Sarah says that she'll come quietly from the village. [source: ChicagoEpguides]

Outro: I trust you'll join us for the exciting conclusion of this adventure next week. In fact, I'm sure you will, for it will provide an opportunity to observe one the rarest of universal phenomena: the regeneration of a Time Lord. We'll return next Sunday night at 11 for the conclusion of "Planet of the Spiders." [source: ChicagoEpguides]