Over the course of four years, Peter Robbins staked everything he owned to build his own submarine, the Alicia , in a bid to explore the sunken wrecks of German U-boats.

Peter Robbins has dreamed of submarines all his life, and over the course of four years, has staked everything he owned to build his own submarine, the Alicia , in a bid to explore the sunken wrecks of German U-boats. As an engineer, he is fascinated by the precision of U-boat technology, and as an entrepreneur he is intrigued by the prospect of underwater tourism. Assembled from more than two million parts, will the Alicia be the success he hoped for? NOVA dives into uncharted waters on the maiden voyage of one man's lifelong dream.