Civil War-Era Submarine - In Louisiana's bustling French Quarter sits a surprising remnant of American warfare - a Civil War-era submarine. Salvaged from the depths of a New Orleans lake, the origin of this vessel remains a murky mystery. As a young boy, the New Orleans contributor was fascinated by the presence of the iron-clad vessel and its unknown origin. As an adult, he discovered that one of his ancestors may have helped build this sub, contributing to the advanced military innovations spurred by the Civil War. Will the History Detectives rescue the story of this Louisiana man's ancestor and bring the early history of America's secretive underwater warfare to the surface? Red Cloud's Pipe - In California, a HISTORY DETECTIVES viewer owns an American Indian pipe that family legend suggests was given to her ancestor by the famous warrior Chief Red Cloud. The contributor knows that her great-great-grandfather was the Indian agent who moved the Oglala Lakota to the Pine Ridge Reservation in South Dakota. Would Chief Red Cloud have given such a gift to a U.S. government official? The quest for the answer takes HISTORY DETECTIVES back to the turbulent days of the 1870s; the team uncovers a battle of wills and political scandal reaching the highest levels of government, reverberating today. The Edison House - A Union, New Jersey, resident has heard a strange story about his home: that it was designed and built by inventor Thomas Edison. But Edison is known for inventing the motion-picture camera, electric lighting and wireless telegraphy, not house construction. History detective and architectural historian Gwen Wright investigates and discovers a surprising story of technological innovation, failed inventions and an approach to housing that was 30 years ahead of its time.