the core meet crack in the world ( 1965 make for tv ) . the acting be stock and the suspense predictable . once you subtract all of the plot rip off from the core basically the manned drilling machine you end up with the plot of crack in the world . crack be a truly excellent movie star dana andrew . his team of scientist and work in south africa and drill down to the crust and punch through with a nuclear device in order to provide a steady source of geothermic energy . one of his subordinate and also a brilliant scientist disagrees . he believe that the blast will not drill a simple hole and but will instead form crack in the crust . ( possible spoiler ) he be right . in order to stop the resultant crack from destroy the earth they must place another nuclear device in the path of the crack . although i have place a spoiler warning and i do not know if i really spoil anything for either movie . and since crack in the world be only available in very rare vhs format if at all my decision not to reveal whether or not the counter blast work be probably academic . all in all and i rate descent just below average .