Diving in deep water is an intimidating challenge. Diving without gear is even more terrifying. William Trubridge, a “purist free-diver,” holds to that bold standard. He is known to swim to incredible depths completely unassisted. Host Tyler Harcott explores how pressure increases dramatically as a person dives deeper into the ocean. Using a submerged Styrofoam cup, Harcott is able to see how much power the ocean has to compress anything in its path. Recognizing this tremendous strength, Harcott accompanies Trubridge on a dive of a lifetime in the Bahamas. Trubridge attempts his most challenging dive, a 100-meter descent on a single breath of air. Will he be able to complete the dive? Can his body withstand the pressure?