ABC Family's 'Pretty Little Liars'
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ABC Family's 'Pretty Little Liars'

Aria, Spencer, Hanna and Emily are four estranged friends who share a dark secret. When they start to receive strange messages from someone in their past, the girls fear the secret that bonds them might be revealed. The series airs Tuesdays at 8 p.m. ET on ABC Family. (Courtesy of ABC Family)

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