a bunch of loose marine be send to a remote island to diffuse it of bomb . when there they start to uncover a government cover up that take place many year ago . it all seem that many year ago alien land on the island and proceed to kill everyone on the island or something like that . the government somehow or other cover the alien and their ship in concrete . the find out to much and be leave on the island to die . xtro 3 be a pretty dull affair that remain below average throughout . the effect on the alien be fair until we see them jerkily move about the place . the act isn not to great either and most of the character be really annoy i end up hat all of them and look forward to their demise . the effect of the helicopter attack on the other hand look really good but it hardly a saving factor . the plot have be do to death the new setting of an island do nothing to help thing along . the strange guy they find be kind of funny at time with be dance and his rambling . the end be just terrible . pretty much a below average sci fi film with poor effect and a do to death plot . 4/10 .