The Curse of Oak Island Season 13 Episode 10: Secret Entrance and Mysterious Void

For Rick and Marty Lagina and their dedicated team, the 231-year-old Oak Island mystery has always been fought on two fronts: the subterranean battle against the treacherous geology of the Money Pit, and the surface-level hunt for clues left by those who may have altered the landscape centuries ago. In Season 13, Episode 10, these two fronts converge with striking intensity, offering tantalizing hints that the island may finally reveal some of its most closely guarded secrets.

The episode opens in the Money Pit area at a site known as the Peacock, long a focal point for the team due to water testing revealing high concentrations of silver and other metals. The team drills borehole DN13, positioned just feet from a previous hole that hinted at a potential cavern. The goal is daring: intercept the solution channel, a natural underground tunnel thought to have been used by the original depositors, and uncover the source of the precious metals.

Tension mounts as the drill penetrates the depths. Between 118 and 144 feet, the drill rods drop a shocking 16 feet in free fall—a classic sign of a void. Marty Lagina notes that this sudden drop could indicate they are near the structure they have long hoped to find. The implications are staggering: a void at this precise location suggests the team may have discovered the offset chamber, a legendary treasure vault connected to the Money Pit via the flood tunnel.

Back in the war room, the team’s anticipation intensifies with forensic analysis. Partnering with Prohawk Technology Group, experts enhance the muddy footage captured inside the borehole. The result is breathtaking: what was once obscured by water now reveals a cluster of stake-like objects arranged with precision, indicating human craftsmanship. Even more striking is a bright, reflective rectangular object—sharp-edged and metallic—contrasting sharply with the surrounding limestone and clay. The experts estimate over a 90% chance these anomalies are man-made, confirming the team has likely located a structure untouched by previous searchers.

Meanwhile, the island’s surface holds its own secrets. In the triangular swamp, Rick Lagina and landowner Tom Nolan follow a trail of evidence pointing to a man-made industrial zone. Excavator Billy Ghart and metal detectorist Gary Drayton uncover artifacts, including an iron gate latch dating to the 13th century, suggesting the swamp was once dry land secured by gates before being intentionally flooded. A pottery shard with a unique green and blue glaze matches pieces found on lot 26, tying the swamp to Portuguese-style construction and hinting that a stone road may have facilitated the movement of heavy cargo—possibly treasure—from ships to hidden caches.

Lot 8 becomes another focal point of discovery. Archaeologist Laird Niven observes a massive, oddly placed boulder surrounded by a ring of stones. Excavation reveals soil intentionally disturbed and refilled, with a piece of cut wood wedged beneath the rock. The most dramatic revelation comes when Fiona Steel finds a deep void beneath the boulder, suggesting a concealed shaft or ventilation tunnel. The precise placement of the stones hints at a marker or ceremonial function, consistent with the depositors’ known skill in camouflage and engineering.

Historical analysis further deepens the intrigue. A lead bag seal from Leeds, England, potentially dating back to the 1300s, indicates large-scale trade and logistical operations on Oak Island. Combined with Portuguese-style pottery and medieval iron fixtures, these finds suggest the island was not a simple pirate hideout but a hub of organized activity spanning centuries, possibly involving the Knights Templar or other powerful groups.

Episode 10 exemplifies the multi-layered complexity of the Oak Island mystery, blending high-tech exploration of subterranean chambers with traditional archaeology of surface lots. The drill’s encounter with a void, coupled with enhanced video showing structured timber and metallic anomalies, transforms the search from speculative to targeted. Meanwhile, the swamp and lot 8 provide corroborating evidence that the island was engineered to hide its secrets, with boulders, swamps, and stone roads serving as strategic covers.

As the episode concludes, it becomes clear that the team is closing in from multiple angles. The Peacock area may hold the most critical find since the Money Pit itself. The reflective rectangle, structured timber, and 16-foot void point toward a tangible man-made chamber. Meanwhile, the boulder on lot 8 could mark a hidden entry into the island’s subterranean network, bypassing booby traps and flood tunnels.

With each discovery, the historical stakes rise. The combination of metallic anomalies underground, medieval trade artifacts, Portuguese construction evidence, and precisely placed surface features suggests a massive, sophisticated operation. Oak Island’s secrets appear carefully planned and executed by individuals or groups capable of reshaping the terrain and concealing their work for centuries.

Looking ahead, the preview for the next episode promises even higher stakes. Water rich in precious metals, long stretches of voids, and bricks hint at permanent man-made infrastructure underground. The Lagina team appears on the verge of connecting historical artifacts to a functional subterranean network, potentially rewriting the narrative of Oak Island. The drill is turning, targets are locked, and centuries of silence may soon be broken. After 231 years, the island’s defenses are showing cracks, and its treasures may finally emerge from the shadows.