Dark Skies (Blu-ray)Amazon. com Producer Jason Blum, who scored major successes with micro budget horror hits Paranormal Activity and Sinister, applies the same high voltage approach to this well crafted thriller about a suburban family under assault from malevolent forces. Writer director Scott Stewart (Legion, Priest) adds an interesting element of zeitgeist to the proceedings by translating the family's financial instability Dad (Josh Hamilton) searches in vain for