The Curse of Oak Island Season 13, Episode 3: New Discoveries Fuel Medieval Theory

The Curse of Oak Island returned with Season 13, Episode 3, titled “Medieval Intentions”, delivering a mix of intriguing finds, renewed speculation, and several investigative dead ends. Although the pace of the episode slowed at moments, the discoveries that did emerge point increasingly toward a medieval presence on the island — a theory the team is no longer able to ignore.

Roman Coin Confirmed in the Lab

The episode opens in the Oak Island research lab, where the team revisits last week’s most significant discovery: a copper coin recovered from the swamp.
Lab technician Emma Culligan confirms the artifact as a 3rd-century Roman coin, prompting the team to bring in a secondary expert for verification. His conclusion? Identical.

While the double analysis may have extended the runtime, the confirmation strengthens the growing belief that Oak Island’s history predates the colonial era by more than a millennium.

Venetian Blue Glass Bead Adds to Old-World Puzzle

Further lab testing on the small blue glass bead discovered earlier in the season reveals that it is Venetian in origin. Its age remains uncertain, but its European craftsmanship adds another layer to the mystery.

The swamp continues to produce items with clear ties to medieval Europe — a puzzle the team is increasingly motivated to solve.

Swamp Digging Yields Timber Fragment Finds

A new excavation plan in the swamp produces several wooden fragments.
None appear significant on their own, but their presence reinforces long-standing theories that the swamp may conceal the remains of a man-made structure — or possibly a ship.

For now, however, the finds remain inconclusive.

Lot 5 and Lot 4 Deliver Mixed Results

At Lot 5, the team uncovers a pipe stem and several pieces of pottery, modest finds that suggest historic occupation but offer few concrete answers.

The investigation then moves to Lot 4, where metal detecting expert Gary Drayton recovers a nail and a small lead object. Drayton suggests the piece bears a resemblance to a 14th-century Templar cross, although its exact identity remains unconfirmed.
The possibility, however, adds fuel to the fan-favorite Knights Templar theory.

Money Pit Drilling Produces Four Cores — and No Answers

The episode concludes with renewed drilling efforts in the Money Pit.
Four separate core samples — humorously described by fans as “mud sausages” — yield nothing of significance.

Despite the lack of findings, the team remains committed to locating a tunnel, chamber, or constructed space that could reveal the long-sought treasure vault.

A Season Building Toward Bigger Revelations

While Episode 3 does not deliver a major breakthrough, the cumulative impact of the findings — a Roman coin, Venetian glass, a potential Templar artifact — continues to push the narrative toward a pre-Columbian European presence on Oak Island.

With seismic data, swamp excavation, and new drilling locations yet to be explored, the Lagina team is confident that larger discoveries may be just ahead.