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The Paranormal Activity horror franchise is taking its final terror trip.

Paranormal Activity: The Ghost Dimension, in theaters Oct. 23, will mark the conclusion of the franchise that has dominated the Halloween horror month with four previous installments (starting with 2009's Paranormal Activity) and one spinoff.

"It's coming to an end. This is it, the finale," says producer Jason Blum. "We're saying it before the movie opens. We're not going to grind this horror franchise into the ground. This will keep Paranormal Activity as part of this culture and this particular time in a really fantastic way."

As importantly, The Ghost Dimension will answer the bevy of questions at the core of the demonic mystery which have lingered throughout the series. Paranormal Activity 2 (2010), Paranormal Activity 3 (2011), Paranormal Activity 4 (2012) and offshoot Paranormal Activity: The Marked Ones (2014) left devoted fans demanding answers about the root of the modern-day hauntings and the mysterious demon Toby.

Filmmakers haven't been forthcoming as the body count has grown.

"We couldn't go just teasing," says Blum. "All the questions that everyone has asked from the past Paranormal Activity films: What does Toby look like? What's the backstory to the families? These questions have been teased out. Now they will be answered."

Even Toby will be revealed after remaining unseen in previous films.

"We've done well without showing Toby, being able to create tensions and scares based on audiences' imagination," says producer Oren Peli. "But people are very curious."

Peli launched the series as director of Paranormal Activity, which he shot for $15,000 on videotape with actors Katie Featherston and Micah Sloat. The found-footage horror, which imagined a demonic possession in a modern San Diego condo, become a phenomenon which has grossed more than $383 million over five small-budget movies.

The franchise has centered around two sisters, Kristi and Katie, dealing with a powerful demon. The movie has made a franchise star out of Featherston, who has played the adult and eventually possessed Katie and the only character to appear in each film.

The Ghost Dimension, directed by Gregory Plotkin, follows a new family, the Fleeges — father Ryan (Chris J. Murray), mother Emily (Brit Shaw) and their young daughter Leila (Ivy George) — who move into a house and discover a video camera and a box of tapes in the garage.

When they look through the camera's lens, they begin to see the paranormal activity happening around them — including the re-emergence of young Kristi and Katie.

The video camera footage is presented onscreen in 3-D, a first for the franchise. It also inflates the bottom line for the film. "It's hard to make 3-D movies with a microbudget," says Blum, who declines to specify how much filmmakers had to work with.

But he says it's worth the cost to celebrate the final Paranormal.

"At some point, might there be a reboot? You never know. We've never discussed it," says Blum. "(But) we made this movie like it's the end of this Paranormal line for sure."

"It's coming to an end. This is it, the finale," says producer Jason Blum. "We're saying it before the movie opens. We're not going to grind this horror franchise into the ground. This will keep Paranormal Activity as part of this culture and this particular time in a really fantastic way."