Showtime's "In the 20th Century" is a millennium-related series of feature-length documentaries in which famous directors take on major subjects of their choosing. In the third of the six films, "Yesterday's Tomorrows," filmmaker Barry Levinson delves into what we, as Americans, thought the future would be as we traveled through the 20th century. Houses and cars of the future, the promise of technology, and the other hopes and dreams of the early part of the century gave way to the fears and anxieties brought about by the atomic age and the ...