Triangle Terror: For years, the flying saucer has been synonymous with UFO terror. But is it still the spacecraft that frightens us the most? Or has fear taken a new shape? (S2, ep 12)
UFO Photos: As the world continues to evolve into the digital age, more and more people are capturing images in the sky that they are unable to explain. (S4, ep 11)
UFO Metal: Nations all over the world are rumoured to have found metal debris from UFO crashes. Join the investigation into the alleged wreckages of otherworldly crafts. (S2, ep 11)
Finding Aliens: Advances in technology have given us unprecedented access to distant galaxies that may harbour life. However, alien life may be found closer to home. (S4, ep 10)
Antigravity: Experts discuss the possibility of advanced alien technology that could allow UFOs to fly at blinding speed or hover effortlessly a few feet above the ground. (S2, ep 10)
Alien Journeys: Alien encounters have offered a possible glimpse into the secrets of interstellar navigation. Could this one day ensure mankind's survival? (S4, ep 9)
Signs of Abduction: From loss of time and bizarre hazy memories, to terrifying accounts of alien surgery, these are the hidden signs of alien abduction. (S2, ep 9)
Fast Eddie: While the guys pick the back roads of Minnesota, they challenge Danielle to sell a 10-foot fiberglass cowboy boot that's been gathering dust for more than a year. (S4, ep 11)
Trading Up: On the scavenge in Ohio, Illinois and Indiana, Frank strikes gold when he buys a rare BSA motorcycle and falls in love with a pinball machine featuring Happy Days' the Fonz.
The team meet an intriguing man who claims he is a 'psychic picker', as well as search a steelyard full of rusty junk and an old farm where treasures are plentiful. (S2, ep 7)