Pretty Little Liars Season 3, Episode 15 Sneak Peek: Why Is Mona "Losing Sleep"? (VIDEO) Tweet January 10, 2013 at 04:34PM EST by Rebecca Martin Related: Pretty Little Liars, Sneak Peeks , Spencer Hastings , Emily Fields , Mona Vanderwaal , Season 3 , Season 3 Episode 15 Credit: YouTube Air date: January 15, 2013 Mona (Janel Parrish) may have won over her classmates on Pretty Little Liars Season 3, Episode 14: “She’s Better Now,” but she's yet to convince the Liars that they should trust her. Can she change their minds during Season 3, Episode 15: "Mona-Mania!" (January 15)?
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