Indulging his dream to become a real-life Captain Nemo, American entrepreneur Peter Robbins oversees the design and construction of an ambitious personal submarine. With this innovative vehicle built in part from scavenged materials, Robbins aims to take his maiden voyage underwater in search of sunken German U-Boats. His imagination, struggles, and triumphs are celebrated in this compelling documentary from "Nova." 56 min. Soundtrack: English.