You mean the part where he was a double agent working for the Chinese but not actually because he was infiltrating them but to do that he had to be a "spy" in the Feds and Don and everyone had no idea what was really going on and they were trying to figure it out before Colby could get killed?

I saw part of that, so I kind of know what happened but I'm still really fuzzy on a lot of it. I think I stopped watching partway through season 2, something like that.