Dinosaurus!

A tropical island that time has half forgotten. Thanks to some very contrived plotting (freak flashes of lightning and the like), various animals of Jurassic vintage are brought back to life. There's a bizarre sub-plot about the friendship between all-American teenager Alan Roberts and caveman Gregg Martell, and a surprising vein of sentimentality. Ludicrous but mildly more engaging than the customary Killer-B.