WATCH: HBO Documentary Beware the Slenderman Looks at Case of Two Middle School Girls Who Tried to Kill Classmate
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When is Beware the Slenderman on HBO, who is the Slenderman and what's the documentary about? | The Sun
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SXSW: 'Beware the Slenderman' Doc Director Says 'the Internet is Not the Enemy Here' (Q&A) – The Hollywood Reporter
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