There's something new among the antiques as this PBS perennial opens its season with a three-week stint in Chicago: "Good Morning America"'s Lara Spencer signs on as host. Items appraised include a "spectacular" 19th-century articulated Japanese iron crayfish; a copy of the Beatles' "Yesterday and Today" album with its original "butcher" cover; a copy of "King Lear" with notes by its original owner---John Barrymore---scribbled in margins; an 1881 John LaFarge drawing; and a portrait of 18th-century Harvard president John Holyoke and a chair he owned. In addition, Spencer takes appraiser Simeon Lipman to a ballgame at Chicago's Comiskey Park, where they stop at souvenir stands in search of "future collectibles."