远古外星人 第四季

　　01末日预言TheDoomsdayProphecies                                    　　02玛雅人的阴谋TheMayanConspiracy                                    　　03小灰人TheGreys                                    　　04外星人与大灾变AliensandMega-Disasters                                    　　05与美国太空总署的联系TheNASAConnection                                    　　06普马彭古的秘密TheMysteryofPumaPunku                                    　　07外星人和大脚怪AliensandBigfoot                                    　　08达芬奇阴谋TheDaVinciConspiracy                                    　　09时间旅行者TheTimeTravelers                                    　　10外星人和恐龙AliensandDinosaurs