Mystery at Blind Frog Ranch

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.

Following the clues from a secret Mormon journal, the team discovers a collapsed mine entrance that they believe leads to the Keyhole Chamber and the lost Aztec treasure.

The team descends into the secret Mormon mine entrance. Traversing a labyrinth 250 feet below the surface, the team finally finds the Keyhole Chamber -- and uncovers the truth about the Aztec gold.

In the season premiere, Chad dives deep into an underground passage, discovering artifacts and a potential way through to the keyhole chamber. Meanwhile, geologist Eric Drummond returns from Ohio with intel on how to drill around the meteorite on the ranch. But a midnight intruder on the property digs up an even bigger mystery, putting the team on high alert and impeding their efforts. 

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.

After a mysterious trailer appears on the Ranch's property, Duane is determined to find out who is spying on Blind Frog Ranch. The team uncovers the purpose of the cylinder and discovers that the government has been tracking UAP activity in the area.

Chad and Josh trace the flooded tunnel to a mysterious stone structure laden with Aztec artifacts that reveal an ancient battle to protect the gold. Meanwhile, Eric uncovers a fault line caused by a meteorite impact, leading to an entrance underground.

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.

Using LiDAR to scan the meteorite fault line, Chad and Josh uncover an ancient mining shaft that leads deep beneath the surface. As they follow the shaft underground, they discover a mysterious labyrinth of tunnels and evidence of Aztec civilization.

Geologist Eric Drummond and Chad Ollinger explore a newly discovered cavern deep underground. Duane finds smoke vents at the Bead Site, and James heads to the Aztec capital in Mexico City.

Duane recruits treasure hunter Josh Feldman, who recommends a new plan of action to find the Aztec gold. But before they can break ground, a local Timpanogos tribal elder visits the ranch with disturbing words of warning.

Eric and Chad encounter disaster while attempting to breach the void in the South Cave. A mysterious rumbling shakes the ranch, and James finds evidence of the Aztecs at the Bead Site.

Chad and Eric discover an abandoned mine deep in the mountains and suspect they are being stalked. At the Bead Site, the team unearths evidence of sacrifice.

Chad and Eric find signs of gold at the abandoned mine, but nightfall brings an unwanted stalker to their camp. At the Bead Site, the team unearths an ancient structure.

Disaster strikes when Duane and Charlie attempt to drill down a smoke vent at the Bead Site. Chad and Josh follow the fault line back to the collapsed mine. Eric explores an indigenous site in Ohio that holds clues to Blind Frog Ranch.

Believing they might have drilled into an Aztec aqueduct at the Bead Site, Duane and James head to Mexico to meet an expert. Chad and Josh trace the underground waterway to a remote lake that might be protecting a secret.

A hidden cave entrance below a lake could finally lead the team into the Keyhole Chamber. After training in Florida with some of the best cave divers in the world, Chad navigates a deadly maze of flooded tunnels and makes a shocking discovery.

Duane and Chad Ollinger return to Blind Frog Ranch, armed with cutting-edge tech, to unearth $3 billion in hidden treasure. Shocking new information on the underground tunnel emerges. Claim jumpers invade the property, threatening to derail everything.

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 to flood 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.

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 Ollinger believes there's a fortune of gold buried beneath his property in Utah, Blind Frog Ranch. But even though the land seems to be fighting him at every turn, he's not going to stop until he gets his hands on the gold -- whatever the cost.

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.