Umm, okay, the way I understand things is like this:
1.there are 3 walkers who are leaders among the Outsiders.
2.we have seen physical forms of Behind and Before.
3. The 3rd walker is He-who-walks-Beside.
4. He-who-walks-Beside is either Nemesis or closely associated with Nemesis.
5.the Black Council is a name that Harry calls those that are stirring up trouble.
6.we have a small list of bad guys associated with the Black Council
7. each major supernatural power seems to have a BC traitor in its midst.
8.the Black Council are either working with Nemesis or comprised of members that have been Nem-infected
9.Harry may or may not be a starborn who is believed to have power over Outsiders.
10. Many casebooks involve Harry taking down BC or Nemesis plots.
Are there any key points I am missing or completely off-the-mark about?