Dick Cavett was always an unusual TV talk show host. He’s a Yale-educated literary buff known for interviews that flow more like conversations between old friends. During the heyday of The Dick Cavett Show in the 1960s and ‘70s, Cavett conversed with movie stars, rock stars, authors, heads of state … and his guests were often surprisingly candid. Cavett’s new book, Brief Encounters, chronicles his experiences in show biz -- and some outside it.