Mystery at Blind Frog Ranch

Duane won't stop until he gets his hands on the gold under his property.

With an access tunnel to the underground cavern finally opened, and a tantalizing clue discovered, Duane's son Chad takes a risky dive into the flooded cave system -- and what he finds defies all explanation.

Duane decides that the flooded cave is too dangerous to dive into again, forcing the team to explore new access points to the underground cavern system. But something lurking in the darkness forces everyone to reevaluate their safety.

While searching unexplored areas of the ranch for an alternate entrance to the cavern system, the team discovers mysterious ancient markings on a cliffside and a mining shaft dug deep into the mountain that could lead them right to the gold.

Duane employs ground-penetrating radar to scan the land near a potential drill site, leading to a mysterious finding. Trespassers prompt Charlie to increase security on the ranch with a camera system -- capturing a frightening sight in the dead of night.

As winter closes in and the digging season nears its end, Duane takes a final shot at getting into the underground cavern ... but uncovers a whole new mystery about the land he owns.

After a long winter, the crew returns to Blind Frog Ranch to strategize a new plan to get the box out of the underwater cave. And Charlie asks for help to investigate a mysterious death on the ranch.

The results from radiocarbon testing are in, which will tell Duane if the box is Aztec or not. Then, the men discover they are being surveilled by a high-tech camera mounted just above the cave entrance.

When a windstorm ruins visibility in the water, Chad considers a risky blind dive to extract the box. But when intruders are discovered, Duane and his crew realize that time is running out.

Chad makes a huge mistake, derailing the operation to drag the box out of the cavern. But when they pull out some of the box's contents, they are shocked by what they discover.

Determined to get into the cavern, Duane and his team explore new methods to find a dry entrance. While Chad takes to the skies in search of a natural opening. Eric thinks the radioactive rocks found in the box might show them where to dig.

After Duane makes a costly mistake, Eric and Chad finally discover what they've been looking for. However, the crew gets caught in the cross hairs of mysterious intruders.

After the crew drills into a dry cavern, they must devise a plan to protect themselves from radioactivity and poisonous gasses. But as they get close to finally entering the cave, trespassers descend upon the ranch.

As Duane and crew explore the cavern they find themselves overcome by a deadly and invisible gas cloud. Complications with their rescue leaves them wondering if they will make it out alive.

Duane and Chad Ollinger return to Blind Frog Ranch, armed with tech to unearth $3 billion in hidden treasure; shocking new information on the underground tunnel emerges; claim jumpers invade..

Searching for the hidden entrance to the cave system, the team uncovers an ancient vent shaft above the Energy Zone. But an explosion triggers an underground tsunami that threatens the cave system.

When an underground tsunami floods the cavern system, Duane and his team attempt to breach it from higher ground -- discovering evidence of Aztec artifacts and a crucial clue to the Lost Rhodes mine.

After uncovering a bar of gold at the Bead Site, Chad and James set out to research where it might have come from. With trespassers still threatening the ranch, their discovery sets them on the path of the fabled Lost Rhodes Mine.

Following the trail of the Lost Rhoades Mine, Chad and Ryan attempt to rappel down a 250-foot cliff in a dangerous maneuver to access the Mormon Eye cave. While trekking at high altitude, James suffers a health scare. And back on the ranch, when Duane uncovers more poacher sites, he decides to take matters into his own hands.

Now that the floodwaters have receded at the Energy Zone, the team prepares to resume drilling into the cavern system. Duane takes a stand to remove the poachers from his property. Charlie unearths a deer carcass with unusual bite marks on it.

While drilling into the cavern system to find the Aztec gold, the team strikes an impenetrable object deep below ground. Tests of the site reveal the truth about the Energy Zone and what lies beneath Blind Frog Ranch.

After hitting a meteorite deep underground while trying to drill into the cavern system, the team searches for an alternate route. While scouring the area, Chad discovers a clue that finally leads to a breakthrough.

Chad dives into the underwater passage, uncovering a direct path to the Keyhole Chamber. Eric returns from a meteorite site similar to their findings at Blind Frog. An intruder on the Ranch removes a mysterious piece of equipment.

Chad traces the underground cavern to a mysterious bear marker and a cave hiding a gold ledger, which points them to an ancient Aztec outpost.

Duane investigates a mysterious on Blind Frog Ranch. The team learns the cylinder's purpose and finds evidence of government UAP monitoring in the area.

Chad and Josh, two explorers find Aztec relics in a submerged tunnel while investigating an ancient conflict over treasure. A geologist discovers a hidden entrance beneath a meteorite-created fault line.

The team drills under the Armory to access the flooded area underground, but they make an unexpected discovery that could detonate Blind Frog Ranch. Unfazed by the dangerous surroundings, Duane pushes forward to find the Aztec gold.

As they continue trying to enter the Aztec gold chamber, the Ollingers take on their biggest project yet: draining the pond. But when a health crisis strikes Duane, Chad must take the lead.

The team embarks on an expedition to a remote meteorite impact site, located on a treacherous mountain above the ranch; they uncover clues that lead them to an underground cavern. As Duane's health continues to decline, Chad must step up.

Chad and Josh use LiDAR to find an ancient mining shaft beneath the meteorite fault line. Underground, they discover a mysterious tunnel labyrinth with evidence of Aztec civilization.

When Duane Ollinger falls ill, treasure hunter Josh Feldman takes over the hunt for Aztec gold; Josh and his father track down a Mormon journal that holds clues about the treasure.

The team discovers a mine entrance that leads to the Keyhole Chamber.

The team finally breaches the Keyhole Chamber.

The team learns of another Aztec treasure chamber: the Golden Staircase.

James and Josh continue their search for the mysterious Golden Staircase.

Charlie consults local experts to expel potent forces haunting the ranch.

Outsiders close in as a blast reveals a hidden tunnel.

Winter arrives at Blind Frog Ranch as the team descends into a cavern and navigates confusing tunnels. They discover a stone structure thought to be the Golden Staircase, then Alex explores a submerged cave seeking Aztec gold.

Duane and Chad Ollinger return to Blind Frog Ranch to lay out their plan of attack to find the Aztec treasure they believe is hidden underground. Experts analyze the evidence that has been uncovered so far.

Chad brings the BFR team together with top experts to examine all of the artifacts and evidence they've collected during the last dig season. Geologist Hector Estrella theorizes that water moving underground could be creating the mysterious rumble the team has experienced on the ranch. Roger Blomquist believes the altar at the Bead Site could be evidence of Montezuma's tomb buried under the rock formation. Bob Morton authenticates the composition of the Jade Bead, likely a sacred Aztec artifact carried all the way from Mexico to BFR. Mark Julian suggests that digging on the ranch has awoken a dark shapeshifting creature that could be a skinwalker.