When evolutionary zoologist Nick Cutter discovers prehistoric creatures alive and well in the present day the natural world is turned on its head and humanity faces a threat to its very existence. Unexplained anomalies are ripping holes in the fabric of time, allowing creatures from the very earliest stages of Earth's development to roam the modern world. Cutter and his team struggle to keep the looming disaster secret while dealing with savage dinosaurs and other deadly foes. Cutter also has to deal with a deeply personal dilemma - he discovers that his wife Helen, missing believed dead for eight years, has actually been travelling in the past; now she is back with possible answers to the riddle of the anomalies, but is it an answer she is willing to share?
《史前逃龍》是由英國廣播公司BBC皇牌製作《與龍同行》的監製精心策劃，他將驚險的動作設計、緊張懸疑的節奏、天馬行空的時光穿梭，以及刻骨銘心的愛情故事共冶一爐，炮製出這部結合尖端電腦特技效果的連續劇，其高質素更可媲美荷里活電影製作！首集會把史前生物帶到二十一世紀。兇猛的、惹人喜愛的、困惑的史前生物都會一一呈現觀眾眼前！不論過去和未來的生物，都走進一個不屬於牠們的現代世界。歷史會否因此而改寫？面對史無前例的威脅，人類能否化險為夷？
為了保衛人類的安全，Cutter教授和他的搭擋歇力阻止這些史前生物的入侵。與兇猛的恐龍、巨大的昆蟲、史前的附生植物等接觸，他們又會遇到什麼危機？然而，最令人意想不到的是，這些史前生物的入侵竟為Cutter教授帶來一點希望──Cutter教授的太太Helen於八年前失蹤，大家都認定她已離開人世。可是，Cutter教授卻發現Helen其實是因時空錯亂而到了另一個空間……
