The Mystery Of The Cyclops: Experts investigate whether an advanced civilisation of giants built Malta's mysterious megaliths. Could they have had extraterrestrial help? (S1, ep 6)
Searching For Bigfoot: Experts investigate why sightings of Bigfoot are so often accompanied by reports of UFOs. Could the Sasquatch be an alien living in our midst? (S1, ep 5)
The Mystery Of Loch Ness: Giorgio Tsoukalos investigates whether sightings of the Loch Ness monster could be caused by a disturbance in the space-time continuum. (S1, ep 4)
Nazi Time Travelers: Experts join the trail of purported Nazi time travel device, Die Glocke. Did it really exist? And could it have been based on alien technology? (S1, ep 3)
The Hunt For Atlantis: New clues narrow down the possible location of Atlantis and suggest that Plato's mysterious island was the home of an advanced civilisation. (S1, ep 2)
The Roswell Rock: Ancient Aliens' Giorgio Tsoukalos investigates whether aliens lie at the heart of Earth's most famous mysteries, beginning with the enigma of Roswell Rock. (S1, ep 1)
World's End: Lisa has to make a game-changing decision: help a competitor push further into the arctic unknown, or stick with her teammates and convoy back to Polar HQ. (S8, ep 12)
Journey to the End of the Earth: With temperatures rising and the winter roads melting away, it's a mad dash to the finish line and VP Express and Polar are neck and neck (S8, ep 11)
Icing On The Lake: Darrell continues teaching Reno how to drive the ice roads, Art gets some royal help on a trip far north and Lisa and Todd hit a road block. (S8, ep 10)
Flirtin' with Disaster: With Darrell's new company on a roll, he calls in a surprising reinforcement. But can this new team member hack the treacherous ice roads? (S8, ep 9)