Pretty Little Liars Season 4, Episode 18 Spoilers: 10 Things We Learn From the Promo

Pretty Little Liars is on a roll, with two action-packed episodes that delivered big thrills and even bigger answers. Will Season 4, Episode 18 (“Hot for Teacher”) continue the trend? We certainly hope so, and the episode's promo is definitely promising. In fact, there's a lot to learn about the episode from this preview, so we've taken a close look to see what it reveals. 1. Hanna finds out Spencer's theory. The promo opens with Hanna telling Spence, "You've gotta be on crack if you think...


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