From Beyond Synopsis
Based on the pulp-horror fiction of H.P. Lovecraft, From Beyond stars Jeffrey Combs as the mild-mannered Crawford Tillinghast, apprentice to the dangerously obsessed Dr. Pretorious, and co-inventor of an enigmatic and ominous-looking device known as "The Resonator" - a machine designed to stimulate the vestigial sensory apparatus contained within the human pineal gland. Such stimulation allows participants to "see" the slimy creatures which occupy a dimension parallel to our own, but with some chilling side effects - the first of which being that the interdimensional vision works both ways. When a powerful sentient force devours Pretorious and assumes his consciousness, Tillinghast panics and destroys the Resonator - soon to find himself in a padded cell, accused of his mentor's murder.