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'7th Heaven's Mackenzie Rosman in SyFy movie 'Ghost Shark' (Photos)

<div class="meta "><span class="caption-text ">David Randolph-Mayhem Davis appears as Blaise and former &#39;7th Heaven&#39; star Mackenzie Rosman appears as Ava in a scene from the SyFy Original Movie &#39;Ghost Shark,&#39; which premieres on the cable channel on Aug. 22, 2013 at 9 p.m. ET. (SyFy)</span></div>
July 30, 2013 2:58:31 PM PDT