Aliens, Plagues And Epidemics: Experts investigate reports of strange bronze flying ships spotted during the Black Death. Could aliens have brought deadly disease to Earth? (S3, ep 7)
Underground Aliens: From a cave in Ecuador said to hold tablets containing alien knowledge, to an underground city in Turkey, explore supposed extraterrestrial lairs. (S2, ep 7)
The Other Earth: Ancient Alien theorists explore world mythology as they investigate whether extraterrestrials could be responsible for our existence. (S8, ep 6)
Secrets Of The Mummies: Experts investigate the mysterious origins of mummification. Could this global practice be proof that aliens once visited Earth? (S7, ep 6)
The Star Children: Experts comb history for evidence of children with strange abilities and great knowledge. Could these young people have been born from ancient aliens? (S6, ep 6)
The Reckoning - Part 1: With just days left, targets are huge and there's no room for error. Conner Aviation battles for survival and, at Pihl, there's one man who won't survive the week.
The fury of hurricane force winds and rain hit Oregon. Will the worst storm in 25 years put the logging industry in jeopardy? Strong language. (S1, ep 11)
Curse of Kalina: Jimmy and James come face-to-face with the 12-foot gator that has stalked them for weeks, while Jay questions if the Salina job is cursed. (S3, ep 10)
Clash Of The Titans: The competition between the logging companies remains fierce as the gap between them narrows. Can Rygaard's new greenhorn prove he's up to the challenge?
As they return to work after Thanksgiving, there's more trouble ahead for the loggers. Will the race for profits, mistakes and inexperience put lives at risk? (S1, ep 10)