SANDPOINT — “Radioflash,” a survival thriller which was partially in Bonner County, has been assigned a Nov. 15 release date, according to IMDb.

Written and directed by Ben McPherson, the films sees a teenage girl help lead her family to safety after a nuclear device causes an electromagnetic pulse that kills power to more than 200 people.

The teen protagonist is played by Brighton Sharbino, an actress from Texas who had a recurring role on “The Walking Dead” and guest roles on “Once Upon a Time” and “True Detective.”

The film also stars Dominic Monghan of “Lord of the Rings” fame and Will Patton, who has over a hundred acting credits including “Silkwood,” “Armageddon” and “The Postman,” part of which was filled in Metaline Falls, Wash.

Filming in Bonner County took place in the fall of 2017. Filming locations include Sandpoint, Hope, and Clark Fork. Other locations include Spokane, Kootenai River Falls and Heron, Mont., according to production notes posted to IMDb.

“It’s a head-for-the-hills movie, but what if the hills don’t want you there,” McPherson said during a break in filming in Hope.

McPherson said the picture was originally to be set in an urban area, but producers pivoted to a rural setting in order to open the story up to new possibilities. He said Bonner County was chosen as a location because one the film’s producer’s has family in the area.

Moreover, northern Idaho and western Montana would be logical routes of migration for people fleeing urban areas such as Spokane.

“It does sort of take a natural route,” McPherson said of the film’s location.

The Bridge to Nowhere on Highway 200 was used for a practical-effects crash scene in which the film’s protagonists barrel through a road blockage authorities were unable to clear.

In “Radioflash,” the electromagnetic pulse, also known as an EMP, was triggered by a nuclear attack on the U.S. The EMP shuts down grocery stores, fuel stations and cellular communications.

“It expedites the panic,” said McPherson.