We've all talked to our TV screens, but what if they talked back?

That's the question alarmingly raised in this clip from "Paranormal Activity: The Ghost Dimension," debuting exclusively on Moviefone. In the preview, brothers Ryan (Chris J. Murray) and Mike (Dan Gill) watch a 20-year-old video tape they found in the basement of Ryan's new home. In it, two girls -- Kristi and Katie (remember them from "Paranormal Activity 3"?) -- are seen being induced into a trance-like state, with the goal of making contact with the other side. But, as it turns out, "the other side" is the here and now. Pretty freaky.

"Ghost Dimension" marks the fifth -- and final -- installment of the "Paranormal Activity" franchise, and ties together elements of the first four movies, while serving up a whole new chapter.

Watch the creepy clip (and the trailer) and catch "Paranormal Activity: The Ghost Dimension" when it hits theaters everywhere October 23rd.