Invasion from Inner Earth

Invasion from Inner Earth (1974) is an apocalyptic science fiction film, starring Paul Bentzen and Debbi Pick. The film was directed by Bill Rebane, the same director of Monster A Go-Go (1965), and The Giant Spider Invasion (1975). The film, also known as Hell Fire and They, was inspired by the British film The Strange World of Planet X (1957), and filmed in the style of thrillers directed by Alfred Hitchcock.

Plot
A group of pilots in the Canadian wilderness begin to hear strange reports over their radios about planes crashing, cars stalling, and a deadly plague which has gripped the planet. As the plot continues, it's clear that Earth is in the midst of an invasion. The pilots barracade themselves in a cabin in the woods and wait for impending doom.

Cast

 * Paul Bentzen
 * Debbi Pick
 * Nick Holt
 * Karl Wallace
 * Robert Arkens
 * Arnold Didrickson
 * James Steadman
 * David Pray
 * Mary O'Keefe