遠古外星人檢視7500萬年來年地球上最不可思議的外星人存在的證據。從恐龍時代到古埃及再一路到當今美國西部沙漠上的天空。描繪著奇怪生物的古老山洞壁畫，埃及金字塔中不知名生物遺骸所製成的瀝青狀物質，這些東西在美國不斷地被目擊到，而它們只是所有發現的冰山一角。
ANCIENT ALIENS examines 75 million years of the most credible alien evidence here on Earth, from the age of the dinosaurs, to ancient Egypt, to the skies over the western desert in the present day US. Ancient cave drawings of strange creatures, an asphalt-like substance in an Egyptian pyramid made from the remains of unidentified creatures, continued mass sightings in the USA -- these are just a few of the strange stories that will be investigated.
