Encore - A WWII Marine’s jacket with stitched inscriptions; a vintage Airstream that may have made a historic journey; and sheet music bearing Abraham Lincoln’s signature.

China Marine Jacket - A man in Santa Monica, California, received an embroidered jacket as a gift from his son. The contributor, a former Marine, is intrigued by the jacket's stitched inscriptions, which read: "4th Marines," "Shanghai," "China," "1937-1939" and "MWD." He knows the 4th Marines were transferred from Shanghai to the Philippines in November 1941 amidst growing tensions with the Japanese. The unit was attacked by the Japanese on the same day as the Pearl Harbor bombings. Some of the men who fought in the Philippines never returned, having suffered Japanese imprisonment and the Bataan Death March. But to whom did this particular jacket belong, and what was his legacy as a Marine? HISTORY DETECTIVES host Gwendolyn Wright travels to Washington, DC, and Los Angeles to investigate the story of the "China Marines," a regiment that worked under extreme circumstances to keep the peace and protect American interests during the perilous ramp up to World War II.

Airstream Caravan - A couple in Southern California owns a classic Airstream trailer that may lay claim to an illustrious past. The trailer's fading numbers and logo indicate that it is an early member of the elite Wally Byam Caravan Club International. In the mid-20th century, members of this adventure club followed legendary leader and Airstream founder Wally Byam all over the world: Central America, Europe, Africa and the Yucatan Peninsula. Did this particular Airstream make the journey on the historic "Cape Town to Cairo Caravan" of 1959? HISTORY DETECTIVES host Tukufu Zuberi heads to Denver and Southern California to explore one man's wanderlust at the birth of American leisure travel and, ultimately, to a spectacular 221-day, 14,307-mile trek from the tip of Southern Africa to the pyramids of Ancient Egypt.

Lincoln Forgery - A woman in Portland, Oregon, owns a bound volume of 19th-century sheet music. The book contains several "Abraham Lincoln" signatures on random pages. At the end of one of the compositions, a handwritten notarized inscription claims the music is a gift from President Lincoln's widow, Mary Todd Lincoln, to Lincoln's former coachman, William P. Brown, in 1866. Could the sheet music really be from Lincoln's personal library? HISTORY DETECTIVES host Wes Cowan travels to Chicago and Springfield, Illinois, to explore the years after Lincoln's death and to illuminate the origins of these curious documents.