Ah, finally...a thinking-man's movie for a change! A film that's intelligent, thought-provoking, cerebral! That's right, gang...I just popped "Citizen Kane" into the VCR, while you poor saps torture your gray-matter with this cinematic head cheese! Enjoy...
The story in this movie is very simple, in both senses of the word. Nuclear scientist Steve March (the aforementioned Mr. Agar) and his fellow researcher Dan (Robert Fuller of "Emergency" fame) detect pulses of radiation coming from within the heart of "Mystery Mountain", a nearby mesa. While briefly visiting his fiancee Sally (Joyce Meadows) and her father, Steve announces his plans to go on an expedition to Mystery Mountain to check out what the heck's goin' on. Sally's father advises Steve not to go (plot point!!); Steve naturally takes a well-stocked Jeep up to the mesa with Dan.