Nick Dawes knows as much about antiques as probably anyone alive. With more than one hundred appearances on “Antiques Roadshow” since its US edition debuted in 1996, Dawes has sifted through thousands, perhaps millions, of family heirlooms in the thirty to sixty seconds allotted for each supplicant by the busy TV production schedule. Talking antiques, Dawes reminisces about “the ones that got away,” and the time he discovered a ceramic vase painted by Picasso that sold for $400,000. Word to the wise: if you ever hear the phrase “this is a very interesting object . . .” brace yourself—your curio is probably worthless.