“Paranormal Activity” fans hoping for a continuation of — or perhaps a bit of closure to — the supernatural saga that has stretched out over four films since the 2007 original insinuated itself into their nightmares may be disappointed by “Paranormal Activity: The Marked Ones.” As the subtitle of the new, unnumbered film indicates, the fifth chapter in the series isn’t so much a sequel as a spinoff.
This sharp left turn takes the films’ mythology in strange and not entirely satisfying new directions, including a crazy time-travel element.