Season 11 Episode 8's 'Breakthrough Discovery' Explained

How does major flooding in the Garden Shaft lead to a potential breakthrough discovery for History's "The Curse of Oak Island?" With the help of Dumas Contract Ltd., the "Oak Island" crew attempts to fix the flooding in the Garden Shaft. These efforts lead to more evidence of potential manmade structures.

In the episode, Dumas Contract Ltd. continues to drill into the Garden Shaft to find the source of the water. It was Roger Fortin of Dumas Contract Ltd. who, while in the shaft, discovered a small cavern behind the structure full of wooden timber, as well as what appeared to be signs of man-made structures. According to the episode's narrator, the cavern is located at a depth of 65 feet.

"Seeing the void, or the cavity, your first thought of course is, you know, is this possible connected to an offset chamber or a previously unknown void, cavity, tunnel, and might it lead somewhere?" Rick Lagina said in a confessional interview during the episode. "But you gotta get down there, you gotta put your eyes on it and, if it happens to turn out to be true, wow. That would be amazing."

Before the "Oak Island" team can determine what they may have found, they will first need to stop the flooding, which does not happen in "A Void At All Costs." Like many other discoveries on "Oak Island," it is not necessarily a breakthrough, but it has the potential to be, and only time will tell if it will lead to anything worth filming.