远古外星人第四季的剧情介绍
01末日预言The Doomsday Prophecies
02玛雅人的阴谋The Mayan Conspiracy
03小灰人The Greys
04外星人与大灾变Aliens and Mega-Disasters
05与美国太空总署的联系The NASA Connection
06普马彭古的秘密The Mystery of Puma Punku
07外星人和大脚怪Aliens and Bigfoot
08达芬奇阴谋The Da Vinci Conspiracy
09时间旅行者The Time Travelers
10外星人和恐龙Aliens and Dinosaurs