Viking Gods: Ancient alien experts investigate the mysterious and fearsome Norse Gods. Were they divine? Or could the all-powerful Vikings have been guided by aliens? (S5, ep 6)
Monoliths: A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help? (S5, ep 5)
Strange Abductions: Experts scrutinise The Bible for evidence of alien abductions. Could extraterrestrials have been kidnapping humans for thousands of years? (S5, ep 4)
Beyond Nazca: Ancient alien theorists explore the mysterious phenomena of the Nazca Lines. Could these huge geoglyphs in Southern Peru have an extraterrestrial connection? (S5, ep 3)
Prophets & Prophecies: Did prophets such as Elijah and Joseph Smith communicate with a heavenly source or did they actually come into contact with extraterrestrials? (S5, ep 2)
Secrets Of The Tombs: Experts question the startling similarities in burial tombs from distant cultures, asking if aliens could have influenced their complicated designs. (S5, ep 1)
Dodger Doggin' It: Rick aims for an all-star restoration when Tommy Lasorda, Ron Cey & Paul Lo Duca ask him to turn a 50s Coke cooler into an LA Dodgers-themed hot dog cart. (S5, ep20)
Magic Of The Gods: Experts search ancient accounts of magic for evidence suggesting that the wizards and witches of yesteryear were given otherworldly knowledge by aliens. (S5, ep 15)
The Power Of Three: Experts investigate the power of the number three in history, science and astronomy. Could its huge significance bear links to extraterrestrial life? (S5, ep 14)
Crystal Skulls: Experts explore the controversy surrounding the ancient Crystal Skulls, asking what powers might be unleashed if all 13 artefacts were brought together. (S5, ep 13)