The Curse of Oak Island Season 12 finale, Concrete Evidence, continues the team’s exhaustive search for the legendary Money Pit and its elusive treasure.

The episode begins with metal detecting on lot 4, where spoils from previous excavations are examined.

The team discovers a button, believed to date from the 1700s or 1800s, and a small lead artifact.

Gary Draytona seasoned metal detectorist, suggests the lead coin could be an ancient coin weight, potentially related to large gold coins.

However, Emma Culligan offers a contradictory view, identifying the artifact as modern debris.

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The different interpretations reflect the continuing difficulty in determining the historical significance of the island’s finds.

‘Golden Egg’ challenges give rise to wacky theory

The team is frustrated because continued drilling in an area nicknamed “the golden egg” is producing no significant results.

Geoscientist Ian Spooner presents a surprising hypothesis: Excessive drilling could disperse or dilute precious metals, making them undetectable.

Spooner recommends suspending drilling operations to preserve potential evidence of treasure.

The proposal represents a strategic shift for the team in what appears to be another setback.

As part of their evolving approach, the team is turning to historical data from the Restall family, who conducted treasure hunts on the island decades ago.

Their plan involves tracing flood tunnels that are supposed to lead to the Money Pit. However, the exact location of the tunnels remains a significant obstacle.

Despite past failures with similar strategies, the team remains optimistic that modern technology and updated maps could yield better results this time around.

Excavations at Smith’s Cove linked to Restall family

At Smith’s Cove, Billy Gerhardt leads the excavation of a large pit, hoping to uncover evidence of the flood tunnels. Excavations discovered fragments of wood, rocks and a flat concrete slab.

The concrete is believed to have been poured by the Restall family in an attempt to block the tunnels and prevent flooding.

However, ongoing water issues raise questions about the effectiveness of this effort. This discovery adds another layer of intrigue to the mystery of the island.

The episode ends with the team preparing for further exploration, balancing their efforts between revising old plans and mining new information.

As the search progresses, the team remains determined to uncover the secrets buried beneath Oak Island.

Fans can expect more discoveries and challenges in upcoming episodes as the quest for the legendary treasure continues.

The Curse of Oak Island airs Tuesdays at 9/8c on History.