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<img src="http://www.moviesom.com/resources/20150216211140social.jpg" title='Knock' alt='Knock'/>
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<h1>Knock</h1>
<p>Casie, a bright young college girl is home alone and up late studying for her finals when she suddenly hears a strange knocking on her front door.</p>
<details><summary>Runtime: 7</summary>
<summary>Release date: 2011-10-31</summary></details>
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