Paranormal Activity 4 uncovers what's really bugging that demon

Paranormal Activity is the franchise that keeps on giving. The last film was its biggest yet, earning $205 million worldwide. So it's no surprise it's back for round four. Despite the threat of overkill, directors Ariel Schulman and Henry Joost promise there's more story to be told.

In the latest issue of Entertainment Weekly, Schulman and Joost explain that Paranormal Activity 4 serves a purpose. In the grand scheme of things, it actually advances the series.

"I can tell you this - we're definitely expanding on the mythology and the history of this demon," says Schulman. "We're really trying to get to the bottom of it!"

They also gave an update on what's really going on with Katie (Katie Featherston). The duo claims she'll be back in some form or fashion, as "she haunts our dreams." It's a cryptic response, but would you expect anything different?

Paranormal Activity 4 opens Oct. 19.

(via Dreadcentral)