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 barricade themselves in a cabin in the woods and wait for impending doom.