maybe is not LY after allHey,
I had the same problem and tried my best to search everywhere for those 3 chapters. Everywhere and everyone who has the "downloaded" version of the videos is missing these videos. But if you have the 2007 videos, you can supplement those for these 3 chapters. Other than the 'lac operon' that he talks about in 2007 videos, nothing else is different. Lac operon is not HY apparently so they did not include it in the 2010 videos.