I've recently started rewatching season 3 and can't believe that I had forgotten how good this season was, imo. It's my favorite season for a lot of different reasons, Legacy being on of them.
The actors on Stargate SG1 are phenomenal - ESP in this episode! I wanted to cry for Daniel (MS was terrific), I loved the interactions b/c Jack and Daniel throughout the ep(I wish we could see more of this - their friendship is unique and I love it!), and it was great to see TR have the opportunity to be more than the brainy CMO that always manages to find the answer.
All in all, though, I LOVE this episode!