D.C. Dennett discusses Darwin 'the number one philosopher who wasn't a philosopher' in a free online video on iTunesU c/o Stanford University. The video is nearly two hours long. There is a 13-minute recap of the previous week's lecture before D.C. Dennett is introduced. Dennett appears at 14.40 looking uncannily like Darwin. Dennett is a great lecturer. Well worth watching.