本片是一部英国科幻片，由Leslie Norman导演，由Dean Jagger/Edward Chapman/Leo McKern主演。
剧情简介：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 and bigger. What is it?? How do you destroy a thing that "feeds" on energy?
外文名：X--the Unknown
类型：科幻 / 悬疑 / 恐怖
地区：英国
导演：Leslie Norman / Joseph Losey
编剧：Jimmy Sangster
演员：Dean Jagger / Edward Chapman / Leo McKern / Anthony Newley
