I wouldn't be a PBS über-geek if I neglected to promote the fourth season of History Detectives.
The show is along the lines of Antiques Roadshow except instead of folks dragging in their trash and treasures a team of appraisers, historians, and authors seek to authenticate the provenance of a few mystery items. They travel to local libraries, delve into archives, and consult with museums and experts in the field.
The season opener explores the extent of the Chisholm Trail; investigates a cache of posters for Harry Houdini; and researches a flag said to have draped the casket of President McKinley.
The show will be broadcast on Monday, June 19th. Check your local listings for dates and times.