Came across Series 2 over at The Bad Astronomer so I went over to YouTube via the link and found Series 1 & 2. I'm so glad for Carl Sagan and his optimism for the human race and where our capabilities and future opportunities lie. He had such faith that given time, we would solve our problems and turn to the stars. Here's hoping that he is right and perhaps, as we do public outreach, in some small way, we may turn the public to the stars and thinking about where our future lies, out there. Enjoy!
Sagan Series 1
Sagan Series 2