The Australian Outback's wildest treasure hunters face even bigger challenges in their quest to strike it rich, as they seek the legendary Queen of Gems: opal.

Alien Encounters: Fact or Fiction? takes viewers inside a local watering hole in Roswell, NM, where real people search for answers about their strange, unexplainable encounters with UFOs.

Dakota Fred and his son Dustin risk their lives to find a fortune in gold nuggets, taking them deep beneath the waters of one of Alaska's wildest creeks.

Modern day treasure hunter Drew Pritchard travels the length and breadth of the country in search of weird and wonderful objects. The bigger the hoard, the happier he is.

For families moving entirely off-grid, the learning curve is steep. To save their homesteads, they call in survival experts to prepare them for the worst.

Modern day treasure hunter Drew Pritchard travels the length and breadth of the country in search of weird and wonderful objects. The bigger the hoard, the happier he is.

Car dealer supremo Mike Brewer and mechanic Marc 'Elvis' Priestly help hapless petrolheads trade up their unwanted vehicles to get them the car of their dreams.

Car dealer supremo Mike Brewer and mechanic Marc 'Elvis' Priestly help hapless petrolheads trade up their unwanted vehicles to get them the car of their dreams.

Dakota Fred and his son Dustin risk their lives to find a fortune in gold nuggets, taking them deep beneath the waters of one of Alaska's wildest creeks.

Modern day treasure hunter Drew Pritchard travels the length and breadth of the country in search of weird and wonderful objects. The bigger the hoard, the happier he is.

Modern day treasure hunter Drew Pritchard travels the length and breadth of the country in search of weird and wonderful objects. The bigger the hoard, the happier he is.