I am sure that most readers have already seen the show on NOVA. Nevertheless, if you have not, Google Video now offers you a compact version of the three times 55-minute-long masterpiece of popularization of science:
The original PBS home page of the program only contained the show cut into many more pieces.
If you decide to view a Google Video, you may switch to a full screen mode by double-clicking the video while it's already running. F11 makes it "even more fullscreen".