iTunes Store has offered the first three hours of the ABC series "Defying Gravity" the past two weeks, so--since I am lacking in American television programs at the moment--I watched them over the past few days. The premise is that forty or so years from now, eight astronauts take off on a six-year tour of the solar system. But there is a hidden agenda known only to a couple administrators and the commanding officer and coming from a mysterious presence known as "Beta" that apparently has the ability to communicate as well as alter the biology of those on board the ship.