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Watch Pretty Little Liars Season 4 Episode 21 online and ask yourself: could Spencer be a murderer? That question was posed this week.

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Looking to watch Pretty Little Liars Season 4 Episode 21 online? TV Fanatic is your destination for every paid and free streaming option of the Pretty Little Liars S4E21 full episode from 2 affiliates.

Rating: 3.5 / 5.0 (51 Votes)

Watch Pretty Little Liars Season 4 Episode 21 online to see the fallout from Aria discovering the truth about Ezra.

Episode Details

Pretty Little Liars Season 4 Episode 21: "She's Come Undone"

How will Aria react to the big news concering Ezra? As we find out here, not well.

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