Dave attempts to crack the old timers' code in the town of Marysville.

Dave uses his experience to decode 1,400 acres of Birdseye Mine.

On the banks of the Missouri River lies a geological hotspot where gold runs with sapphires at the El Dorado Mine. With the owner focused on gems, Dave has a chance to take all the gold. But it's down deep and he needs a lot of it to bring his crew.

An old buddy offers Dave a stake in land the old timers missed.

Dave travels miles underground into the old abandoned tunnels at Miller Mountain Mine. Avoiding falling rocks and squeezing through collapsed passageways, Dave must find enough hard rock gold to change the future of his lost mine's dream.

Entering 50-year-old abandoned tunnels of Lovitt Day Mine, Dave is on the hunt for hundreds of millions of dollars of gold left in the rock. With the last living miner to work these tunnels, Dave searches for a life-changing haul of hard rock gold.

Dave takes part in a fire test to find gold deep in the Alaskan wilderness.

The team checks into a historic hotel with dark past in Buffalo, NY. Disembodied voices and shadows are everywhere, but the haunted elevators prove most terrifying when communications fail and they each find themselves alone.

The owner of a bed and breakfast fears paranormal activity on the property may be having a negative impact on her family and guests. The Ghost Brothers head to New Hampshire to investigate the cause of the haunting.

The team heads out to Lake Shawnee Fun Park, an abandoned amusement park with a tragic and deadly past. They then visit a residence in rural West Virginia to investigate a creepy, persistent haunting with family ties.

Phil and Jessica head to Lake Lanier -- the deadliest lake in America -- to uncover rumors of drownings and ghostly encounters.

Jack and Katrina travel to Juneau, AK, to conduct the first-ever investigation of the Alaskan Hotel. Built for luxury, the historic hotel has developed a reputation for demonic activity due to its notorious criminal past.

With winter approaching, the Kilchers pin all their hopes on one hunt.