Slipping along an ill-defined track between seriousness, subtle farce, and all-out slapstick, this sci-fi comedy-drama by director Irvin S. Yeaworth, Jr. (The Blob, 1958) would be entertaining enough for the moppet set and highly amusing in many spots for adults as well. What sets the ball rolling is that a tyrannosaurus rex, a brontosaurus, and a neolithic man are brought back to life from their prehistoric world. As desperate leaders of the modern world try their best to kill off the carnivorous tyrannosaurus rex, the caveman is receiving high-voltage culture shock from the civilization he encounters all around him. One sequence has him coming face to face with a woman in full make-up -- and both go screaming off in terror. Gregg Martell is the confused Neanderthal, Julio (Alan Roberts) is a boy who tries to make friends with the brontosaurus, and Mike Hacker (Fred Engelberg) is the requisite villain.~ Eleanor Mannikka, All Movie Guide