There's a saboteur afoot at a secret government facility in the desert; a professor from the Office of Scientific Investigation and a female agent seek answers to the malfunctions which have resulted in the deaths of top scientists. Producer Ivan Tors, who also gets an original story credit, loved mixing science-fiction with science-fact, but perhaps gets too carried away here with his love of teaching science (the tour of the facility's many laboratories constitutes nearly half the film's running-time). While the exhibitions and scientific theories are certainly interesting, the technical jargon becomes monotonous. Nicely-produced on a low budget, and with some suspense near the finale, but--as a thriller in the sci-fi genre--it lacks a good old-fashioned charge of excitement. ** from ****