PORTRAIT OF GEORGE WASHINGTON--Washington, D.C.--Could a portrait passed down a Washington D.C. family for generations actually be an authentic portrait of our nation's first president, George Washington? That is the charge for the HISTORY DETECTIVES in this fascinating episode. Our investigators attempt to prove whether or not the famed artist Gilbert Stuart, whose resume includes the portrait of Washington that appears on today's dollar bills, was the artist behind the painting in question. Might this painting prove to be a national treasure? PATTY CANNON--Frederick, Maryland--Could a Maryland family's home once have been the headquarters for the slave trade of Patty Cannon, coined 'the most wicked woman in America'? Legend has it the she was a villainous woman who stole slaves and kidnapped free African-Americans to then sell them back to plantation owners . Now the HISTORY DETECTIVES team investigates to see if they can prove once and for all that this is in fact the former home of Patty Cannon. Will they be able to draw long sought after conclusions or will the mystery remain? TRUMPET--Philadelphia, Pennsylvania--Is a Philadelphia man's trumpet that he bought at a local auction somehow tied to the Revolutionary War? That is the mystery bestowed upon the HISTORY DETECTIVES to solve this time around. Inscribed with the name "Captain Lewis," the trumpet appears to have been used by the aforementioned captain during the battles that won America's independence from England. Will the trumpet prove to be a valuable piece of American history or will the team turn up empty handed?