Episodes of “Antiques Roadshow” return to Baltimore this season.

Maryland Public Television is featuring the Maryland Zoo in three episodes of the popular series next month.

The upcoming episodes filmed at the zoo feature an 1865 Lewis M. Rutherford lunar photograph; a Patek Philippe and Tiffany platinum pocket watch, circa 1910; and Lynne Drexler oil paintings — one is worth up to $570,000.

The 2024 appraisal event at the Maryland Zoo was the series’ third visit to Baltimore after previous productions in 2007 for Season 12 and 1999 for Season 4.

“Antiques Roadshow,” which has been nominated for an Emmy Award 22 times, began its 29th broadcast season in January. It is the most-watched ongoing primetime PBS series, reaching approximately five million loyal weekly viewers across TV, streaming, online and social media.

The appraisers included Paul Winicki, founder of Radcliffe Jewelers, and Craig Flinner, founder of the Craig Flinner Gallery in Hampden.

The two local appraisers have been with “Antiques Roadshow” for nearly 20 years each.

The appraisal show includes an episode that features a search for “hidden treasures in Maryland,” including George Patton’s gold World War I trench watch, a 1949 Charles Loloma pot and Joseph Erlanger’s Nobel Prize and diploma. One is valued at $150,000 to $200,000.

On April 9, MPT will host a sneak preview screening of the April 14 episode at 7 p.m. in its visitors center in Owings Mills. The event is open to the public and free to attend, but registration is required.

Baltimore is one of five cities featured this season. Other venues visited during the show’s 2024 tour were Crystal Bridges Museum of American Art in Bentonville, Arkansas; Springs Preserve in Las Vegas; Living History Farms in Urbandale, Iowa; and Denver Botanic Gardens Chatfield Farms in Littleton, Colorado.

The Maryland episodes will air April 14, 21 and 28 at 8 p.m. on MPT-HD and PBS stations nationwide. Episodes are also available to watch live and on demand using MPT’s online video player and the PBS app.

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