British Army radiation drills at a remote Scottish base attract a subterranean, radioactive entity of unknown nature that vanishes, leaving two severely radiation-burned soldiers... and a "bottomless" crack in the earth. Others who meet the thing in the night suffer likewise, and with increasing severity; it seems to be able to "absorb" radiation from any source, growing bigger...
由导演Leslie Norman,Joseph Losey执导，1956年上映的《X--未知的元素》，是由Dean Jagger,Edward Chapman,Leo McKern,Anthony Newley等主演的科幻片。
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