This past weekend I ended my 'No TV' experiment after 2 months. Wasn't exactly planned, but I saw that Discovery Channel was showing "When we left Earth: The NASA Missions" (Discovery Channel web folks: TV show pages + Firefox = FAIL. Fix please.).
Being a bit of a space geek, I just had to watch it and wasn't disappointed. The first two episodes covered the Mercury and Gemini missions with historic footage and recent interviews with astronauts and Mission Control staff.
There wasn't anything really new from a historical perspective, but there was a lot of cool archival footage. I enjoyed watching the first two parts of the series. People who only know the space program through shuttle launches will probably be impressed once they realize how much technology has changed between the early missions and now.