In 1991, professional diver John Chatterton discovered a sunken German U-boat from World War II, lying undetected only 60 miles off the New Jersey shore, its unexploded torpedoes and the bodies of its crew still aboard. This two-hour special follows Chatterton and his dive partners in their dangerous quest to identify the missing U-boat, a pursuit that takes six years and costs three lives. The U-boat's history involves unusual coincidences and a startling twist of fate.

An expedition looks into whether Titanic's hull had a construction design flaw that caused her to break apart. Featuring advanced CGI technology, archive documents and photographs, as well as footage from the modern-day History(R) expeditions, "Titanic's Achilles Heel" is a remarkable journey into the ongoing legacy of a ship that continues to capture the world's attention.

Embark on an expedition of discovery as divers searcha remote area of the Gulf of Thailand for Lagarto's final resting place. Join CDR Frank Latta and the crew from Lagarto's construction and commissioning in Manitowoc, Wisconsin, to the final encounter with the Japanese minelayer Hatsutaka. Hear the personal stories of CDR Latta and the brave men of USS Lagarto-- and the families, parents, wives, and sons and daughters they left behind.