In a nutshell, Ray Harryhausen makes a bunch of stop motion dinosaurs terrorize a bunch of grunting cavemen and cavewomen. The story, as it is, involves a banished caveman discovering a friendlier tribe of cavepeople along the coastline. The most memorable and iconic part of this film is that one of that friendly cavewomen is a loin clothed bikinied Raquel Welch. Welch had already appeared in the hit film "The Fantastic Voyage" but it was this film that made her a pin-up icon. Being a Hammer film production, this film does not have the biggest budget and it shows in how Harryhausen has to cut corners on his usually top notch special effects, most noticeably with real lizards standing in for dinosaurs in a few scenes or the stop-motion giant turtle having it's hind legs drug behind it and not having the time and money to animate them. Overall, this is a very cheesy movie, but it's still enjoyable in a cheeseball sort of way, especially if you're in the right mood.