Not bad at all, despite the flat performances by some members of an attractive cast and the familiarity of it all. "This island never sleeps," says the full-figured DANA GILLESPIE to PATRICK WAYNE...especially when it's crawling with prehistoric creatures. She's clad in an outfit that looks as though Frederick of Hollywood had a hand in the costuming.

Photographed in Spain, the color photography is excellent, the creatures look fairly realistic, and the opening sequence with the plane being attacked by a huge bird is bound to hook you into the story. It's rather like a poor man's "Jurassic Park", but it has its moments.

John Wayne's son, PATRICK WAYNE, is certainly a handsome male lead but has all the animation of one of the dinosaurs, never making us believe he's the leader of the dangerous expedition. Others in the largely unknown cast are pretty good and John Scott's music is effective in creating the necessary suspense.

It's a diverting enough adventure, very watchable and suitable for family viewing.

Summing up: Not bad at all, the sort of film that kiddie matinees were all about.

Best line after a native attack: "I'm sick and tired of running away from those dreadful people!"

At the beginning of the film are reunited captain Lawton (Tony Britton) piloting his icebreaker along with McBride (Patrick Wayne),Lady Cunningham (Sarah Douglas) and Norfork ( Thorley Walters) , everybody undergoing an expedition to Antartic in search for Tyler (Doug McClure) who has been missing in that region for various years. The trio (Patrick Wayne , Sara Douglas, Thorley Walters) along with a plane pilot descend over a barren land and meet a primitive women (a gorgeous Dana Gillespie with amazing cleavage showing her boobs). They have to deal with numerous risks, dangers, endure torrential landslide,volcano, cavemen warriors, prehistoric animals and discover a lost tribe .

This enjoyable adaptation is a special version of the Edgar Rice Burroughs adventure yarn . There are rip-roaring action, spirit of adventure, derring-do, thrills, and results to be quite amusing. It's a brief fun with average special effects , passable set decoration , functional art direction and none use of computer generator. This fantasy picture packs thrills, action, weird monsters, lively pace and fantastic scenarios. The monsters are the real stars of this production and its chief attribute. The tale is silly and laughable but the effects and action are quite well. Among the most spectacular of its visuals there are a deeply shrouded cavern full of skulls roaring menacingly towards the camera, a little tableau comprising attack of a giant monster in a cave, and the futuristic backgrounds of nasty headquarter .Highlights of the adventure includes a roller-coaster trip, appearance of prehistoric reptile such as Pterodactilus, Stegosaurius, Tiranosaurious and some horsemen dressed Samurai-alike riding out from mountain throughout horizon . In addition the final scenes where appears a grotesque executioner played by David Prowse (Darth Vader),a dwarf and usual villain chief and several others. Some illogical parts in the argument are more than compensated for the excitement provided by Roger Dicken's monsters, though sometimes are a little bit cheesy. Filmed in glimmer cinematography by Alan Hume on location in Santa Cruz De La Palma (Canary Islands) and Pinewood studios , England. Adequate and stirring musical score by John Scott. This is the fourth collaboration between producers John Dark, Max Rosemberg and director Kevin Connor who also made in similar style : ¨ Land that time forgot¨, ¨All the Earth's core(76)¨, ¨Warlord of Atlantis(1978)¨, mostly starred by Doug McClure and with Dicken as the monster-maker. The film will appeal to kids who swallow whole and sit convulsed in their armchair.

One of a handful of modestly budgeted, but enthusiastically pulpy fantasy action-adventure features based on Edgar Rice Burrough's hugely enjoyable boys' own novels (other entries in this particular cycle include "The Land That Time Forgot" and "At the Earth's Core"),this characteristically cheap'n'cheerful romp gets by on the basis of its game, go-for-it, a-thrilling-cliffhanger-every-five-minutes 30's serial-style dynamic momentum alone. The strictly serviceable plot centers on a gallant motley quartet who venture to a remote, mysterious, untouched by time Artic island populated by rampaging dinosaurs and warring tribes of primitive cavemen. Aided by a lone foxy, friendly cave babe (David Bowie's luscious onetime girlfriend Dana Gillispie in tight, skimpy, clingy leather Frederick's of the Stone Age apparel that shows off a lot of her fine, fabulously full-figured physique),our brave foursome travel the perilous countryside in search of a missing explorer (beefy series regular Doug McClure sporting a bushy beard). Patrick (Son of John) Wayne does a pretty fair Clint Eastwood impersonation as our intrepid mighty macho man main hero, although he's clearly upstaged by the beauteous Sarah Douglas (Ursa in the first two "Superman" movies) as a feisty lady photographer, Thorley Walters as a hearty anthropologist, and Shane Rimmer as a crusty alcoholic airplane pilot. Kevin Connor's spirited direction keeps things moving along at a brisk, unflagging tempo, ably abetted by John Scott's rousing full-orchestral score and Alan Hume's picturesque cinematography. Furthermore, the bargain basement special effects are lovably shoddy, veteran villains Milton Reid and David "Darth Vador" Prowse make perfectly pernicious last reel appearances as two evil primordial baddies, and with the exception of some mild violence and equally tame profanity the film overall sweetly captures a certain good-natured innocence that's actually quite endearing in its undisguised naiveté. In short, this one's loads of nice, zippy, never-a-dull-moment lively and eventful fun.