Antiques Roadshow Season 15

Part 1 of 2 in Washington, D.C., features a 1958 letter from Martin Luther King Jr.; a circa 1965 Andy Warhol lithograph; and a turn-of-the-20th-century, hand-wrought Gorham silver tea set that's valued at $90,000. Also: the Harry S. Truman Building.

Conclusion. In Biloxi, Miss., items include a suit worn by Olivia de Havilland in the 1943 movie "Princess O'Rourke"; a circa 1890 French industrial clock; and four 1827 watercolors by the Guilford Limner, a North Carolina-based artist.

Part 2 of 3 in Biloxi, Miss., includes a 1943 National League autographed baseball; a circa 1770 sword that was used in the Revolutionary War; and a preserved 1811 silk-on-silk embroidery that's valued at $40,000 to $50,000. Also: vintage space toys.

Part 1 of 3 in Biloxi, Miss., features a circa 1950 Walter Anderson linocut; an 1899 Buffalo Bill poster; and a 1928 bronze sculpture of Russian Ballet dancers that's valued at $100,000 to $150,000.

ROADSHOW brings the paintings of Joseph Henry Sharp into focus at the Yellowstone Art Museum.

A 19th-century Japanese suit of armor; an 1874 oil painting by Swiss artist Luigi Rossi; circa-1825 Parisian gilt bronze serving tray.

Part 1 of 3 in Billings, Mont., features a 19th-century Chinese jade brush washer; a 1752 English silver coursing trophy; and a 19th-century Arthur Brown watercolor scene of Yellowstone National Park that's valued at $75,000 to $125,000.

Roadshow gets a lesson in honey farming in bee-autiful Des Moines, Iowa.

Part 2 of 3 in Des Moines features a collection of late-1950s and ’60s Lucy M. Lewis Acoma Pueblo pottery; an 1820 Russian Loutkin snuff box inscribed with the Romanov dynasty’s imperial arms; and a 1623 Shakespeare First Folio that’s valued between $40,000 and $50,000. Also: an extra-illustrated book set based on a Charles Dickens biography is examined at Salisbury House and Gardens, the estate of 1920s cosmetics tycoon Carl Weeks.

Roadshow looks at sand art by Andrew Clemens at the State Historical Museum of Iowa.

Roadshow glides into Allen Airways Flying Museum to look at early aviation posters.

Roadshow learns about 19th-century American naval cutlasses at the USS Midway Museum.

Roadshow discusses the appeal of vintage Steiff animals at the San Diego Zoo.

Highlights include an archive of correspondence and photos, circa 1965, marking the friendship between a cigar-loving Winston Churchill and the guest’s Cuban great aunt and uncle; a stunning 1908 example of New Orleans’ Newcomb College pottery; and an heirloom collection of vintage diamond rings and a necklace, estimated to be worth $80,000 to $100,000.

Highlights include an archive of correspondence and photos, circa 1965, marking the friendship between a cigar-loving Winston Churchill and the guest’s Cuban great aunt and uncle; a stunning 1908 example of New Orleans’ Newcomb College pottery; and an heirloom collection of vintage diamond rings and a necklace, estimated to be worth $80,000 to $100,000.

Highlights include an archive of correspondence and photos, circa 1965, marking the friendship between a cigar-loving Winston Churchill and the guest’s Cuban great aunt and uncle; a stunning 1908 example of New Orleans’ Newcomb College pottery; and an heirloom collection of vintage diamond rings and a necklace, estimated to be worth $80,000 to $100,000.