首季中Nick Cutter教授和他的团队在Dean森林调查时间异常情况，同时远古时代的恐龙也穿过异常点来到现在，这给小组的调查带来了更多压力和挑战。Cutter教授失踪8年的妻子Helen在异常点中穿梭往来，她究竟掌握何种真相... 上季中，野心勃勃的Helen回到过去，妄图灭绝人类祖先。为阻止Helen紧追而去的Abby、Connor和Danny却被困在了远古… 先后出现的人员伤亡与失踪，使政府对ARC(异常点研究中心)失去了信心，在本季中，私人财团开始介入… 新的队伍将如何面对各种史前猛兽、可怕的未来生物? 迷失于远古的队员们又将何时回归呢?
Release time：
2011
Remarks：
6集全
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