Preview Clip of Pretty Little Liars Season 3, Episode 19: "A" Threatens [SPOILER] (VIDEO) Tweet February 6, 2013 at 11:20AM EST by Rebecca Martin Related: Pretty Little Liars, Spencer Hastings , Mona Vanderwaal , Season 3 , Season 3 Episode 19 Credit: ABC Family © 2013 Disney ABC Television Group In this sneak peek of Pretty Little Liars Season 3, Episode 19: "What Becomes of the Broken-Hearted" (February 12) a completely crazed Spencer Hastings (Troian Bellisario) receives a message tailor-made to make sure she keeps Toby's (Keegan Allen) secret from her friends.
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